Updated on 2026/09/28

写真a

 
PHAM NAM HAI
 
Organization
School of Engineering Professor
Title
Professor
Homepage
https://magn.ee.eng.isct.ac.jp
External link

News & Topics

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Degree

  • 工学博士 ( 東京大学 )

Research Areas

  • Nanotechnology/Materials / Applied physical properties

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials

Education

  • The University of Tokyo

    2006.4 - 2009.3

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  • The University of Tokyo

    2004.4 - 2006.3

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    Country： Japan

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  • The University of Tokyo   Bachelor

    2000.4 - 2004.3

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    Country： Japan

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Research History

  • Institute of Science Tokyo   Department of electrical and electronic engineering   Professor

    2024.10

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  • Tokyo Institute of Technology   School of Engineering, Department of Electrical and Electronic Engineering   Professor

    2024.4 - 2024.9

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  • Tokyo Institute of Technology   School of Engineering, Department of Electrical and Electronic Engineering   Associate Professor

    2016.4 - 2024.3

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  • The University of Tokyo   The Graduate School of Engineering, Center for Spintronic Research Network   Visiting Associate Professor

    2016.4 - 2023.3

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  • Tokyo Institute of Technology   Graduate School of Science and Engineering Department of Physical Electronics   Associate Professor

    2014.5 - 2016.3

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Professional Memberships

Committee Memberships

  • 国際シンポジウム ISAMMA2024   プログラム副委員長  

    2024   

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    Committee type：Academic society

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  • 国際学会 SSDM2024   運営委員  

    2024   

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    Committee type：Academic society

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  • 国際学会 ICMBE2024   総務委員  

    2024   

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    Committee type：Academic society

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  • 日本磁気学会 編集委員会   幹事 、分野主査 (Editor in Chief)  

    2021 - 2025   

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  • National Science Foundation   Research proposal reviewer  

    2019   

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    Committee type：Government

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  • 応用物理学会学術講演会   プログラム委員会委員  

    2016 - 2021   

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    Committee type：Academic society

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  • 日本磁気学会 編集委員会   委員  

    2016 - 2021   

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    Committee type：Academic society

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  • 応用物理学会   代議員  

    2015 - 2016   

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    Committee type：Academic society

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Papers

  • Nonreciprocity of Domain-Wall Motion Induced by Interlayer Dzyaloshinskii–Moriya Interaction Reviewed International journal

    Kota Sato, Shixuan Liang, Ruiyue Chu, Lei Han, Ho Hoang Huy, Pham Nam Hai, Cheng Song

    Nano Letters   Vol. 26   10748–10754   2026.8

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.nanolett.6c02313

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  • Large spin Hall effect in 300 °C annealed BiSb topological insulator and perpendicularly magnetized CoFeB using oxide buffer/seed and interfacial layers on Si/SiO2 substrates Reviewed International journal

    Pham Van Thuan, Ho Hoang Huy, Wentao Li, Shigeyuki Hirayama, Yushi Kato, Pham Nam Hai

    Applied Physics Letters   128 ( 18 )   2026.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    The application of topological insulator bismuth antimony (BiSb) to spin–orbit torque (SOT)–magnetic random-access memory (MRAM) applications using complementary metal–oxide–semiconductor process demands a high temperature exceeding its melting point. Here, we report an oxide-material engineering solution for sputtered BiSb and CoFeB/MgO junctions on an amorphous Si/SiO2 substrate that can withstand a 300 °C annealing temperature. By utilizing TiOx/TaOx buffer/seed layers and TaOx interfacial layer to protect BiSb during 300 °C annealing, we achieved a large spin Hall angle of 11.1 for BiSb and a strong perpendicular magnetic anisotropy for CoFeB/MgO. Our results provide a viable path toward high-performance BiSb-based SOT–MRAM.

    DOI： 10.1063/5.0320146

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  • Infrared optical constants n , κ , and absorption of topological insulator BiSb thin films determined by the reflectance-transmittance technique Reviewed International journal

    Hajime Nishiyama, Pham Nam Hai, Tomohiro Amemiya, Shun Hashiyada, Yukio Kawano

    Optics Letters   51 ( 7 )   1864 - 1864   2026.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Optica Publishing Group  

    In this work, we measure the infrared optical constants ( n , κ ) of topological insulator BiSb thin films using the reflectance-transmittance method. Using the obtained ( n , κ ), we reveal that Bi, Bi 0.9 Sb 0.1 , and Bi 0.85 Sb 0.15 show absorption of about 30% for film thicknesses around 20 nm and a large refractive index ranging from 6 to 9 in the infrared region. Our results suggest that BiSb has strong potential as a material for MIR detectors.

    DOI： 10.1364/ol.586313

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    Other Link： https://opg.optica.org/viewmedia.cfm?URI=ol-51-7-1864&seq=0

  • High-temperature ferromagnetism and large anomalous Nernst effect above room temperature in (In,Fe)Sb ferromagnetic semiconductor Reviewed International journal

    Kota Ejiri, Wentao Li, Shuzo Oeda, Yun Jaeyeon, Kota Iwakura, Masaaki Tanaka, Pham Nam Hai

    Applied Physics Letters   Vol. 128   112404   2026.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0313623

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  • Mid-infrared photothermoelectric detector using topological insulator BiSb thin film Reviewed International journal

    Hajime Nishiyama, Pham Nam Hai, Yukio Kawano

    Optical Materials Express   Vol. 16 ( Issue 3 )   603 - 610   2026.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Optica Publishing  

    <jats:p>
    We demonstrate a mid-infrared (MIR) photothermoelectric (PTE) detector based on a Bi
    <jats:sub>90</jats:sub>
    Sb
    <jats:sub>10</jats:sub>
    thin film, a topological insulator with strong MIR absorption and a high Seebeck coefficient. BiSb films were deposited by magnetron sputtering, a scalable and cost-effective method, on both sapphire and flexible Kapton substrates. The PTE response was systematically evaluated for various device geometries. A maximum voltage of 27 µV was obtained for a 16 mm × 0.25 mm × 80 nm film on sapphire. A 3 × 3 array of 4 mm × 0.25 mm elements was demonstrated. Finally, we demonstrated a large PTE response of 170 µV with improved detectivity
    <jats:italic>D</jats:italic>
    * of 1.1⋅10
    <jats:sup>5</jats:sup>
    cmHz/W for a BiSb-based PTE device on a Kapton flexible substrate. These results highlight the potential of sputtered BiSb thin films for large-area MIR detector arrays with low fabrication cost.
    </jats:p>

    DOI： 10.1364/ome.571598

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  • Architecture of 3D magnetic domain wall memory for suppressing bit-shift error Reviewed International journal

    Pham Nam Hai, Takanori Shirokura, Nguyen Huynh Duy Khang

    Journal of Applied Physics   Vol. 138   233901   2025.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    DOI： 10.1063/5.0284424

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  • Giant perpendicular magnetic anisotropy in Mo/Boron-rich CoFeB/MgAl2O4 structure Reviewed International journal

    Zhang Ruixian, Sho Kagami, Daiki Ito, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    Applied Physics Letters   Vol. 127   232403   2025.12

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    <jats:p>Perpendicular magnetic tunnel junctions (p-MTJs) with perpendicular magnetic anisotropy (PMA) are key devices for scaling magnetoresistance random access memories down to ∼10 nm. However, the magnetic anisotropy field Hk of the intensively studied CoFeB/MgO is still about 4–6 kOe for bottom CoFeB, and the corresponding magnetic anisotropy energy coefficient Keff is about 3 × 106–5 × 106 erg cm−3. In this study, we aim to realize a giant PMA in Mo (2 nm)/Co19Fe56B25 (tCoFeB)/MgAl2O4 (4 nm)/Ta (1 nm) stack. By using the Boron-rich Co19Fe56B25 layer in combination with the Boron-blocking Mo underlayer and the spinel MgAl2O4 oxide layer, we can realize giant PMA in CoFeB with Hk as high as 17.5–19.5 kOe and Keff as high as 6.9 × 106–9.4 × 106 erg cm−3. Auger electron spectroscopy depth profiles reveal that the good balance between the Boron-blocking Mo layer and the Boron-sink MgAl2O4 layer results in about 20% of the original Boron remaining in CoFeB, leading to a small magnetization and giant PMA. Our results pave the way for further scaling of MTJs and improved resistance against thermal and external magnetic field disturbance.</jats:p>

    DOI： 10.1063/5.0301346

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  • Realization of perpendicular magnetic anisotropy and high spin Hall angle in topological semimetal YPtBi/Ta/CoFeB junctions Reviewed International journal

    Sho Kagami, Reo Yamamoto, Zhang Ruixian, Ken Ishida, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    Japanese Journal of Applied Physics   vol. 64   12SP07   2025.12

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    <jats:title>Abstract</jats:title>
    <jats:p>
    YPtBi is a half-Heusler topological semimetal with a large spin Hall angle and high thermal stability. For application to SOT-MRAM, it is essential to fabricate YPtBi/CoFeB junctions with perpendicular magnetic anisotropy (PMA) and high spin Hall angle, which are challenging due to the unfavorable lattice compatibility between YPtBi and CoFeB. In this study, by inserting a Ta spacer layer between YPtBi and CoFeB and optimizing its thickness, we achieved PMA after 300 °C annealing. Subsequently, through optimization of the YPtBi deposition temperature, composition, and CoFeB thickness, we obtained an effective spin Hall angle of
    <jats:inline-formula>
    <jats:tex-math>

    </jats:tex-math>
    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
    <mml:msubsup>
    <mml:mrow>
    <mml:mi>θ</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi mathvariant="normal">SH</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mi mathvariant="normal">eff</mml:mi>
    </mml:mrow>
    </mml:msubsup>
    <mml:mo>=</mml:mo>
    <mml:mn>1.0</mml:mn>
    </mml:math>
    </jats:inline-formula>
    and an effective spin Hall conductivity of
    <jats:inline-formula>
    <jats:tex-math>

    </jats:tex-math>
    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
    <mml:msubsup>
    <mml:mi>σ</mml:mi>
    <mml:mi>SH</mml:mi>
    <mml:mi>eff</mml:mi>
    </mml:msubsup>
    <mml:mo>=</mml:mo>
    <mml:mn>1.6</mml:mn>
    <mml:mo>×</mml:mo>
    <mml:msup>
    <mml:mn>10</mml:mn>
    <mml:mn>5</mml:mn>
    </mml:msup>
    <mml:mspace width="0.25em"/>
    <mml:msup>
    <mml:mrow>
    <mml:mo stretchy="false">(</mml:mo>
    <mml:mi mathvariant="normal">ℏ</mml:mi>
    <mml:mo>/</mml:mo>
    <mml:mn>2</mml:mn>
    <mml:mi mathvariant="normal">e</mml:mi>
    <mml:mo stretchy="false">)</mml:mo>
    <mml:mi mathvariant="normal">Ω</mml:mi>
    </mml:mrow>
    <mml:mrow>
    <mml:mo>−</mml:mo>
    <mml:mn>1</mml:mn>
    </mml:mrow>
    </mml:msup>
    <mml:msup>
    <mml:mi mathvariant="normal">m</mml:mi>
    <mml:mrow>
    <mml:mo>−</mml:mo>
    <mml:mn>1</mml:mn>
    </mml:mrow>
    </mml:msup>
    </mml:math>
    </jats:inline-formula>
    for YPtBi. The latter is comparable to or even superior to those obtained using YPtBi/Pt/Co/Pt junctions. Furthermore, we demonstrated SOT-induced magnetization switching with an ultralow current density. These results indicate that YPtBi is a promising candidate for SOT-MRAM.
    </jats:p>

    DOI： 10.35848/1347-4065/ae2030

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  • Comparison of spin Hall angles measured by spin accumulation, spin–orbit torque, and spin Hall magnetoresistance Reviewed International journal

    Min Liu, Zhang Ruixian, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Xiaoyu Xu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    Japanese Journal of Applied Physics   64 ( 10 )   103001 - 103001   2025.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.35848/1347-4065/ae096c

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  • Device applications of the giant direct and inverse spin Hall effect in BiSb topological insulator Invited Reviewed International journal

    Pham Nam Hai

    Proceedings of SPIE   13586   1358607   2025.9

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.3062225

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  • Role of Pt and Bi on the giant spin Hall effect in topological semimetal YPtBi Reviewed International journal

    Sho Kagami, Ohiro Fujie, Daiki Ito, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, PHAM NAM HAI

    Japanese Journal of Applied Physics   64 ( 5 )   053001 - 053001   2025.5

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    DOI： 10.35848/1347-4065/adcf68

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  • Very high Curie temperature (470–530 K) in (Ga,Fe)Sb ferromagnetic semiconductor grown by step-flow mode on vicinal GaAs substrates Reviewed International journal

    Pham Nam Hai, Ken Takabayashi, Kota Ejiri, Masaaki Tanaka

    Applied Physics Letters   2025.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0227990

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  • Thermal reliability and spin Hall angle of highly textured and epitaxial Bi0.9Sb0.1(012) topological insulator Reviewed International journal

    Quang Le, Brian R. York, Cherngye Hwang, Xiaoyong Liu, Lei Xu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Min Liu, Zhang Ruixian, Shota Namba, PHAM NAM HAI

    Japanese Journal of Applied Physics   Vol. 64   043001   2025.4

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    <jats:title>Abstract</jats:title>
    <jats:p>In this study, we examine the impact of various seed layer materials that facilitate the growth of highly textured or epitaxial topological insulator Bi<jats:sub>0.9</jats:sub>Sb<jats:sub>0.1</jats:sub>(012) on Si/SiOx substrates. We found that cubic-textured (100) or tetragonal (001) seed layers facilitate the epitaxial growth of undoped Bi<jats:sub>1−<jats:italic>x</jats:italic>
    </jats:sub>Sb<jats:sub>
    <jats:italic>x</jats:italic>
    </jats:sub>(012) with more square surface, while seed layers composed of (111) polycrystalline or, alternatively, nanocrystalline or amorphous materials are suitable for growth of highly textured Bi<jats:sub>1−<jats:italic>x</jats:italic>
    </jats:sub>Sb<jats:sub>
    <jats:italic>x</jats:italic>
    </jats:sub>(012):X with more rectangular surface (012), where X is a dopant. By post annealing, we obtained a maximum spin Hall angle of 24 for epitaxial Bi<jats:sub>0.9</jats:sub>Sb<jats:sub>0.1</jats:sub>(012). Furthermore, we found a clear correlation between the spin Hall angle and the column height in Bi<jats:sub>0.9</jats:sub>Sb<jats:sub>0.1</jats:sub>(012) subjected to post annealing up to 215 °C and 3 h. Our findings establish a foundation for effective methodologies aimed at producing high-performance Bi<jats:sub>1−<jats:italic>x</jats:italic>
    </jats:sub>Sb<jats:sub>
    <jats:italic>x</jats:italic>
    </jats:sub> in the (012) orientation on practical Si/SiO<jats:sub>
    <jats:italic>x</jats:italic>
    </jats:sub> substrates using physical vapor deposition.</jats:p>

    DOI： 10.35848/1347-4065/adca78

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  • Effects of metal, oxide, and hybrid metal-oxide interlayers on spin–orbit torque in BiSb topological insulator and magnetic interfaces Reviewed International journal

    Quang Le, Xiaoyong Liu, Lei Xu, Brian R. York, Cherngye Hwang, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Min Liu, Zhang Ruixian, Shota Namba, PHAM NAM HAI

    Journal of Applied Physics   137 ( 12 )   123903   2025.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    DOI： 10.1063/5.0253596

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  • Spin Hall magnetic field sensing device using topological insulator Reviewed International journal

    Min Liu, Zhang Ruixian, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Michael Gribelyuk, Xiaoyu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, PHAM NAM HAI

    Applied Physics Letters   125 ( 24 )   242401   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    DOI： 10.1063/5.0233246

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  • Transport and material properties of doped BiSbX topological insulator films grown by physical vapor deposition Reviewed International journal

    Quang Le, Brian R. York, Cherngye Hwang, Xiaoyong Liu, Michael A. Gribelyuk, Son Le, Lei Xu, Jason James, Jose Ortega, Maki Maeda, Tuo Fan, Hisashi Takano, Min Liu, Zhang Ruixian, Shota Namba, PHAM NAM HAI

    Japanese Journal of Applied Physics   63 ( 12 )   123001 - 123001   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.35848/1347-4065/ad936c

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  • Spin Hall effect in platinum deposited by atomic layer deposition Reviewed International journal

    Ken Ishida, Kota Sato, Pham Nam Hai

    Applied Physics Letters   Vol. 125   162404   2024.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0229825

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  • Effects of post-growth annealing in YPtBi topological semimetal and Co/Pt perpendicular magnetization multilayers Reviewed International journal

    Sho Kagami, Takanori Shirokura, Pham Nam Hai

    Japanese Journal of Applied Physics   Vol. 63 ( No. 2 )   02SP98   2024.2

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    DOI： 10.35848/1347-4065/ad1e98

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  • High spin Hall angle in BiSb topological insulator and perpendicularly magnetized CoFeB/MgO multilayers with metallic interfacial layers Reviewed International journal

    Zhang Ruixian, Huy Ho Hoang, Takanori Shirokura, PHAM NAM HAI, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Michael Gribelyuk, Xiaoyu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano

    Applied Physics Letters   Vol. 124   072402   2024.2

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    <jats:p>In this study, we investigate the spin Hall effect in heterostructures of Bi0.85Sb0.15 (10 nm) topological insulator/Ru(Ti)/Ta/Co20Fe60B20/MgO with perpendicular magnetic anisotropy. By optimizing the Ru (Ti) interfacial layer thickness as well as deposition condition of BiSb, we achieve a large effective spin Hall angle of 6.0 ± 0.1 and relatively high electrical conductivity of 1.5 × 105 Ω−1 m−1 at room temperature. We, then, demonstrate spin–orbit torque-induced magnetization switching driven by a small threshold current density of 1 × 106 Acm−2. Benchmarking shows that the writing power consumption of our stack is 2–3 orders smaller than that of heavy metals.</jats:p>

    DOI： 10.1063/5.0184870

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  • High-efficient spin orbit torque generated by topological semimetal YPtBi deposited on oxidized Si substrates Reviewed International journal

    Takanori Shirokura, Nguyen Huynh Duy Khang, Pham Nam Hai

    Applied Physics Letters   Vol. 124   052402   2024.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0185917

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  • Enhanced spin Hall effect at high temperature in non-centrosymmetric silicide TaSi2 driven by Berry phase monopoles Reviewed International journal

    Ken Ishida, Takanori Shirokura, Pham Nam Hai

    Applied Physics Letters   Vol. 123   262402   2023.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0165333

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  • High temperature spin Hall effect in topological insulator Reviewed International journal

    Takanori Shirokura, Pham Nam Hai

    Applied Physics Letters   Vol. 122   232404   2023.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0143287

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  • Highly efficient spin current source using BiSb topological insulator/NiO bilayers

    Julian Sasaki, Shota Namba, Shigeki Takahashi, Yoshiyuki Hirayama, Pham Nam Hai

    Japanese Journal of Applied Physics   2023.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/aca772

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  • Room-temperature spin injection from a ferromagnetic semiconductor Reviewed International journal

    Shobhit Goel, Nguyen Huynh Duy Khang, Yuki Osada, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    Scientific Reports   Vol. 13   2181   2023.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41598-023-29169-9

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  • Large inverse spin Hall effect in BiSb topological insulator for 4 Tb/in2 magnetic recording technology International journal

    Ho Hoang Huy, Julian Sasaki, Nguyen Huynh Duy Khang, Shota Namba, Pham Nam Hai, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Michael Gribelyuk, Xiaoyu Xu, Son Le, Michael Ho, Hisashi Takano

    Applied Physics Letters   2023.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0135831

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  • Integration of BiSb topological insulator and CoFeB/MgO with perpendicular magnetic anisotropy using an oxide interfacial layer for ultralow power SOT-MRAM cache memory Reviewed International journal

    Ho Hoang Huy, Zhang Ruixian, Takanori Shirokura, Shigeki Takahashi, Yoshiyuki Hirayama, Pham Nam Hai

    IEEE Transactions on Magnetics   Vol. 59 ( No. 11 )   3400905   2023

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TMAG.2023.3275171

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  • Giant spin Hall effect in half-Heusler alloy topological semimetal YPtBi grown at low temperature Reviewed International journal

    Takanori Shirokura, Pham Nam Hai

    AIP Advances   Vol. 12.   125116   2022.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0117613

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  • Ferromagnetism modulation by ultralow current in a two-dimensional polycrystalline molybdenum disulphide atomic layered structure Reviewed International journal

    Iriya Muneta, Takanori Shirokura, Pham Nam Hai, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    Scientific Reports   12 ( 1 )   17199   2022.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    DOI： 10.1038/s41598-022-22113-3

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  • Effect of stoichiometry on the spin Hall angle of the half-Heusler alloy topological semimetal YPtBi Reviewed International journal

    Takanori Shirokura, Tsuyoshi Kondo, Pham Nam Hai

    Japanese Journal of Applied Physics   Vol. 61   073001   2022.7

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    DOI： 10.35848/1347-4065/ac7834

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  • Rhombic Fermi surfaces in a ferromagnetic MnGa thin film with perpendicular magnetic anisotropy Reviewed International journal

    M. Kobayashi, N. H. D. Khang, T. Takeda, K. Araki, R. Okano, M. Suzuki, K. Kuroda, K. Yaji, K. Sugawara, S. Souma, K. Nakayama, K. Yamauchi, M. Kitamura, K. Horiba, A. Fujimori, T. Sato, S. Shin, M. Tanaka, P. N. Hai

    Physical Review Materials   Vol. 6   074403   2022.7

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/physrevmaterials.6.074403

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  • Nanosecond ultralow power spin orbit torque magnetization switching driven by BiSb topological insulator Reviewed International journal

    Nguyen Huynh Duy Khang, Takanori Shirokura, Tuo Fan, Mao Takahashi, Naoki Nakatani, Daisuke Kato, Yasuyoshi Miyamoto, Pham Nam Hai

    Applied Physics Letters   120 ( 15 )   152401 - 152401   2022.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：{AIP} Publishing  

    DOI： 10.1063/5.0084927

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  • Improvement of the Effective Spin Hall Angle by Inserting an Interfacial Layer in Sputtered BiSb Topological Insulator (Bottom)/Ferromagnet With In-Plane Magnetization Reviewed International journal

    J. Sasaki, H. H. Huy, N. H. D. Khang, P. N. Hai, Q. Le, B. York, X. Liu, S. Le, C. Hwang, M. Ho, H. Takano

    IEEE Transactions on Magnetics   58 ( 4 )   1 - 4   2022.4

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    DOI： 10.1109/TMAG.2021.3115169

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  • Efficient spin current source using a half-Heusler alloy topological semimetal with back end of line compatibility Reviewed International journal

    Takanori Shirokura, Tuo Fan, Nguyen Huynh Duy Khang, Tsuyoshi Kondo, Pham Nam Hai

    Scientific Reports   12 ( 1 )   2426   2022.2

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    <jats:title>Abstract</jats:title><jats:p>Topological materials, such as topological insulators (TIs), have great potential for ultralow power spintronic devices, thanks to their giant spin Hall effect. However, the giant spin Hall angle (<jats:italic>θ</jats:italic><jats:sub>SH</jats:sub> &gt; 1) is limited to a few chalcogenide TIs with toxic elements and low melting points, making them challenging for device integration during the silicon Back-End-of-Line (BEOL) process. Here, we show that by using a half-Heusler alloy topological semi-metal (HHA-TSM), YPtBi, it is possible to achieve both a giant <jats:italic>θ</jats:italic><jats:sub>SH</jats:sub> up to 4.1 and a high thermal budget up to 600 °C. We demonstrate magnetization switching of a CoPt thin film using the giant spin Hall effect of YPtBi by current densities lower than those of heavy metals by one order of magnitude. Since HHA-TSM includes a group of three-element topological materials with great flexibility, our work opens the door to the third-generation spin Hall materials with both high <jats:italic>θ</jats:italic><jats:sub>SH</jats:sub> and high compatibility with the BEOL process that would be easily adopted by the industry.</jats:p>

    DOI： 10.1038/s41598-022-06325-1

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  • Ultrahigh efficient spin orbit torque magnetization switching in fully sputtered topological insulator and ferromagnet multilayers

    Tuo Fan, Nguyen Huynh Duy Khang, Soichiro Nakano, Pham Nam Hai

    Scientific Reports   12 ( 1 )   2022.2

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    <jats:title>Abstract</jats:title><jats:p>Spin orbit torque (SOT) magnetization switching of ferromagnets with large perpendicular magnetic anisotropy has a great potential for the next generation non-volatile magnetoresistive random-access memory (MRAM). It requires a high performance pure spin current source with a large spin Hall angle and high electrical conductivity, which can be fabricated by a mass production technique. In this work, we demonstrate ultrahigh efficient and robust SOT magnetization switching in fully sputtered BiSb topological insulator and perpendicularly magnetized Co/Pt multilayers. Despite fabricated by the magnetron sputtering instead of the laboratory molecular beam epitaxy, the topological insulator layer, BiSb, shows a large spin Hall angle of <jats:italic>θ</jats:italic><jats:sub>SH</jats:sub> = 10.7 and high electrical conductivity of <jats:italic>σ</jats:italic> = 1.5 × 10<jats:sup>5</jats:sup> Ω<jats:sup>−1</jats:sup> m<jats:sup>−1</jats:sup>. Our results demonstrate the feasibility of BiSb topological insulator for implementation of ultralow power SOT-MRAM and other SOT-based spintronic devices.</jats:p>

    DOI： 10.1038/s41598-022-06779-3

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  • Spin transport in fully ferromagnetic p–n junctions

    Nguyen Thanh Tu, Tomohiro Otsuka, Yuto Arakawa, Le Duc Anh, Masaaki Tanaka, Pham Nam Hai

    Journal of Applied Physics   131 ( 1 )   013902 - 013902   2022.1

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    DOI： 10.1063/5.0072128

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  • Large spin Hall angle in sputtered BiSb topological insulator on top of various ferromagnets with in-plane magnetization for SOT reader application Reviewed International journal

    H. H. Huy, J. Sasaki, N. H. D. Khang, S. Namba, P. N. Hai, Q. Le, B. York, C. Hwang, X. Liu, M. Gribelyuk, X. Xu, S. Le, R. Nagabhirava, M. Ho, H. Takano

    IEEE Transactions on Magnetics   2022

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    DOI： 10.1109/TMAG.2022.3215481

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  • Magnetic memory driven by topological insulators Reviewed International journal

    Hao Wu, Aitian Chen, Peng Zhang, Haoran He, John Nance, Chenyang Guo, Julian Sasaki, Takanori Shirokura, Pham Nam Hai, Bin Fang, Seyed Armin Razavi, Kin Wong, Yan Wen, Yinchang Ma, Guoqiang Yu, Gregory P. Carman, Xiufeng Han, Xixiang Zhang, Kang L. Wang

    Nature Communications   Vol. 12   6251   2021.12

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    DOI： 10.1038/s41467-021-26478-3

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  • Angle resolved second harmonic technique for precise evaluation of spin orbit torque in strong perpendicular magnetic anisotropy systems Reviewed International journal

    Takanori Shirokura, Pham Nam Hai

    Applied Physics Letters   Vol. 119   222402   2021.11

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    DOI： 10.1063/5.0074629

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  • Giant spin-dependent phenomena in BiSb topological insulator - ferromagnet heterostructures International journal

    Nguyen Huynh Duy Khang, Pham Nam Hai

    Science and Technology in Japan   Vol. 1   45   2021.9

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    DOI： 10.15625/vap.2021.0006

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  • Low power spin–orbit torque switching in sputtered BiSb topological insulator/perpendicularly magnetized CoPt/MgO multilayers on oxidized Si substrate Reviewed International journal

    Tuo Fan, Nguyen Huynh Duy Khang, Takanori Shirokura, Ho Hoang Huy, Pham Nam Hai

    Applied Physics Letters   119 ( 8 )   082403 - 082403   2021.8

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    DOI： 10.1063/5.0062625

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  • Spin Hall effect in amorphous YPt alloy Reviewed International journal

    Takanori Shirokura, Kou Fujiwara, Pham Nam Hai

    Applied Physics Express   14 ( 4 )   043002 - 043002   2021.4

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    DOI： 10.35848/1882-0786/abed8f

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  • Minority-spin impurity band in n-type (In,Fe)As: A materials perspective for ferromagnetic semiconductors Reviewed International journal

    Masaki Kobayashi, Le Duc Anh, Jan Minar, Walayat Khan, Stephan Borek, Pham Nam Hai, Yoshihisa Harada, Thorsten Schmitt, Masaharu Oshima, Atsushi Fujimori, Masaaki Tanaka, Vladimir N. Strocov

    PHYSICAL REVIEW B   103 ( 11 )   115111   2021.3

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    DOI： 10.1103/PhysRevB.103.115111

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  • Spin–orbit torque as a method for field-free detection of in-plane magnetization switching Reviewed International journal

    Nguyen Huynh Duy Khang, Pham Nam Hai

    Applied Physics Letters   Vol. 117   252402   2020.12

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    DOI： 10.1063/5.0033158

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  • Direct observation of the magnetic ordering process in the ferromagnetic semiconductor Ga1−xMnxAs via soft x-ray magnetic circular dichroism Reviewed International journal

    Yukiharu Takeda, Shinobu Ohya, Nam Hai Pham, Masaki Kobayashi, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori

    Journal of Applied Physics   128 ( 21 )   213902 - 213902   2020.12

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    DOI： 10.1063/5.0031605

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  • Spin Hall Effect in Topological Insulators Reviewed International journal

    P. N. Hai

    Journal of the Magnetics Society of Japan   44 ( 6 )   137 - 144   2020.11

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    DOI： 10.3379/msjmag.2009rv001

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  • Ultralow power spin–orbit torque magnetization switching induced by a non-epitaxial topological insulator on Si substrates Reviewed International journal

    Nguyen Huynh Duy Khang, Soichiro Nakano, Takanori Shirokura, Yasuyoshi Miyamoto, Pham Nam Hai

    Scientific Reports   10 ( 1 )   12185   2020.7

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    DOI： 10.1038/s41598-020-69027-6

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  • Inhomogeneity-induced high temperature ferromagnetism in n-type ferromagnetic semiconductor (In,Fe)As grown on vicinal GaAs substrates Reviewed International journal

    Pham Nam Hai, Munehiko Yoshida, Akihide Nagamine, Masaaki Tanaka

    Japanese Journal of Applied Physics   59 ( 6 )   063002 - 063002   2020.6

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    DOI： 10.35848/1347-4065/ab9401

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  • Crystal growth and characterization of topological insulator BiSb thin films by sputtering deposition on sapphire substrates Reviewed International journal

    Tuo Fan, Mustafa Tobah, Takanori Shirokura, Nguyen Huynh Duy Khang, Pham Nam Hai

    Japanese Journal of Applied Physics   Vol. 59   063001   2020.6

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    DOI： 10.35848/1347-4065/ab91d0

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  • Large magnetoresistance and spin-dependent output voltage in a lateral MnGa/GaAs/MnGa spin-valve device Reviewed International journal

    Koki Chonan, Nguyen Huynh Duy Khang, Masaaki Tanaka, Pham Nam Hai

    Japanese Journal of Applied Physics   2020.4

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    DOI： 10.7567/1347-4065/ab5b31

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  • Bias-field-free spin Hall nano-oscillators with an out-of-plane precession mode

    Takanori Shirokura, Pham Nam Hai

    Journal of Applied Physics   2020.1   1944 - 1944   2020.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Applied Physics  

    DOI： 10.1063/1.5142627

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  • Magnetization process of the insulating ferromagnetic semiconductor (Al,Fe)Sb

    Shoya Sakamoto, Yosuke Nonaka, Keisuke Ikeda, Zhendong Chi, Yuxuan Wan, Masahiro Suzuki, Atsushi Fujimori, Le Duc Anh, Pham Nam Hai, Yukiharu Takeda, Yuji Saitoh, Masaki Kobayashi, Masaaki Tanaka, Yuki K. Wakabayashi, Hiroshi Yamagami

    Physical Review B   101 ( 7 )   2020.2

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    DOI： 10.1103/PhysRevB.101.075204

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  • Giant unidirectional spin Hall magnetoresistance in topological insulator – ferromagnetic semiconductor heterostructures Reviewed International journal

    Nguyen Huynh Duy Khang, Pham Nam Hai

    Journal of Applied Physics   Vol. 126   233903   2019.12

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    DOI： 10.1063/1.5134728

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  • Zero-field topological Hall effect as evidence of ground-state skyrmions at room temperature in BiSb/MnGa bilayers Reviewed International journal

    Nguyen Huynh Duy Khang, Tuo Fan, Pham Nam Hai

    AIP Advances   Vol. 9   125309   2019.12

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    DOI： 10.1063/1.5119758

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  • Heavily Fe-doped ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature and large magnetic anisotropy Reviewed International journal

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Applied Physics Express   Vol. 12   103004   2019.10

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    DOI： 10.7567/1882-0786/ab3f4b

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  • Electronic structure of the high-TC ferromagnetic semiconductor (Ga,Fe)Sb: X-ray magnetic circular dichroism and resonance photoemission spectroscopy studies Reviewed International journal

    Shoya Sakamoto, Nguyen Thanh Tu, Yukiharu Takeda, Shin-ichi Fujimori, Pham Nam Hai, Le Duc Anh, Yuki K. Wakabayashi, Goro Shibata, Masafumi Horio, Keisuke Ikeda, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori

    Physical Review B   100 ( 3 )   035204   2019.7

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    DOI： 10.1103/physrevb.100.035204

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  • Lateral silicon spin-valve devices with large spin-dependent magnetoresistance and output voltage Reviewed International journal

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    Advances in Natural Sciences: Nanoscience and Nanotechnology   10 ( 2 )   025001 - 025001   2019.4

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    DOI： 10.1088/2043-6254/ab11df

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  • Influence of crystal orientation and surface termination on the growth of BiSb thin films on GaAs substrates Reviewed International journal

    Kenichiro Yao, Nguyen Huynh Duy Khang, Pham Nam Hai

    Journal of Crystal Growth   511   99 - 105   2019.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.jcrysgro.2019.01.041

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  • Fe delta-doped (In,Fe)Sb ferromagnetic semiconductor thin films for magnetic-field sensors with ultrahigh Hall sensitivity Reviewed International journal

    Kento Nishijima, Nguyen Thanh Tu, Masaaki Tanaka, Pham Nam Hai

    Journal of Crystal Growth   511   127 - 131   2019.4

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    DOI： 10.1016/j.jcrysgro.2019.01.030

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  • A conductive topological insulator with large spin Hall effect for ultralow power spin–orbit torque switching Reviewed International journal

    Nguyen Huynh Duy Khang, Yugo Ueda, Pham Nam Hai

    Nature Materials   17 ( 9 )   808 - 813   2018.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Nature  

    DOI： 10.1038/s41563-018-0137-y

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  • Spin-valve effect in nanoscale Si-based Devices Reviewed International journal

    PHAM NAM HAI

    AAPPS Bulletin   Vol. 28   7 - 25   2018.6

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    DOI： 10.22661/aaPPSBl.2018.28.3.07

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  • Planar Nernst effect and Mott relation in (In,Fe)Sb ferromagnetic semiconductor Reviewed International journal

    Cong Tinh Bui, Christina A. C. Garcia, Nguyen Thanh Tu, Masaaki Tanaka, Pham Nam Hai

    Journal of Applied Physics   123 ( 17 )   175102 - 175102   2018.5

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    DOI： 10.1063/1.5026452

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  • High-temperature ferromagnetism in new n-type Fe-doped ferromagnetic semiconductor (In,Fe)Sb Reviewed International journal

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Applied Physics Express   11 ( 6 )   063005 - 063005   2018.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Applied Physics  

    DOI： 10.7567/apex.11.063005

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  • Electrical tuning of the band alignment and magnetoconductance in an n-type ferromagnetic semiconductor (In,Fe)As-based spin-Esaki diode Reviewed International journal

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   112 ( 10 )   102402 - 102402   2018.3

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    DOI： 10.1063/1.5010020

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  • Electrical control of ferromagnetism in the n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature Reviewed International journal

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Applied Physics Letters   112 ( 12 )   122409 - 122409   2018.3

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    DOI： 10.1063/1.5022828

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  • III-V and Group-IV-Based Ferromagnetic Semiconductors for Spintronics Reviewed

    Pham Nam Hai

    Reference Module in Materials Science and Materials Engineering   2018

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  • Growth and characterization of MnGa thin films with perpendicular magnetic anisotropy on BiSb topological insulator Reviewed International journal

    Nguyen Huynh Duy Khang, Yugo Ueda, Kenichiro Yao, Pham Nam Hai

    JOURNAL OF APPLIED PHYSICS   122 ( 14 )   143903   2017.10

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    DOI： 10.1063/1.4999617

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  • Epitaxial growth and characterization of Bi1-xSbx spin Hall thin films on GaAs(111) A substrates Reviewed International journal

    Yugo Ueda, Nguyen Huynh Duy Khang, Kenichiro Yao, Pham Nam Hai

    APPLIED PHYSICS LETTERS   110 ( 6 )   2017.2

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    DOI： 10.1063/1.4975492

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  • Inverse spin-valve effect in nanoscale Si-based spin-valve devices Reviewed International journal

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    Journal of Applied Physics   122 ( 22 )   223904 - 223904   2017

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    DOI： 10.1063/1.4994881

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  • Ballistic transport in spin-valve Si channel demonstrates feasibility of nanoscale spin-MOSFETs Reviewed

    Rachele Hendricks-Sturrup

    Scilight   2017 ( 25 )   250004 - 250004   2017

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    DOI： 10.1063/1.5018722

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  • Observation of spontaneous spin-splitting in the band structure of an n-type zinc-blende ferromagnetic semiconductor. Reviewed

    Anh LD, Hai PN, Tanaka M

    Nature communications   7   2016.12

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    DOI： 10.1038/ncomms13810

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  • High-temperature ferromagnetism in heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb Reviewed International journal

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Applied Physics Letters   108 ( 19 )   192401 - 192401   2016.5

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    DOI： 10.1063/1.4948692

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  • Visible-light emission at room temperature in Mn-doped Si light-emitting diodes Reviewed International journal

    Pham Nam Hai, Daiki Maruo, Le Duc Anh, Masaaki Tanaka

    Physical Review B   93 ( 9 )   094423/1 - 6   2016.3

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    DOI： 10.1103/physrevb.93.094423

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  • Magnetization process of the n-type ferromagnetic semiconductor (In,Fe) As:Be studied by x-ray magnetic circular dichroism Reviewed International journal

    S. Sakamoto, L. D. Anh, P. N. Hai, G. Shibata, Y. Takeda, M. Kobayashi, Y. Takahashi, T. Koide, M. Tanaka, A. Fujimori

    PHYSICAL REVIEW B   93 ( 3 )   035203/1 - 6   2016.1

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    DOI： 10.1103/PhysRevB.93.035203

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  • Magnetization process of then-type ferromagnetic semiconductor (In,Fe)As:Be studied by x-ray magnetic circular dichroism Reviewed

    S. Sakamoto, L. D. Anh, P. N. Hai, G. Shibata, Y. Takeda, M. Kobayashi, Y. Takahashi, T. Koide, M. Tanaka, A. Fujimori

    Physical Review B   93 ( 3 )   2016.1

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    DOI： 10.1103/physrevb.93.035203

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  • Spin transport in nanoscale Si-based spin-valve devices Reviewed International journal

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    Applied Physics Letters   109 ( 23 )   232402 - 232402   2016

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    DOI： 10.1063/1.4971351

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  • Spinodal nanodecomposition in semiconductors doped with transition metals Reviewed International journal

    Tomasz,Dietl, Kazunori,Sato, Tetsuya,Fukushima, Alberta,Bonanni, Mathew,Jamet, André Barski, Shinji,Kuroda, Masaaki,Tanaka, Pham,Nam Hai, Hiroshi,Katayama-Yoshida

    Reviews of Modern Physics   87 ( 4 )   1311 - 1377   2015.11

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    DOI： 10.1103/RevModPhys.87.1311

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  • Magnetic properties and intrinsic ferromagnetism in(Ga,Fe)Sbferromagnetic semiconductors Reviewed International journal

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Physical Review B   92 ( 14 )   144403   2015.10

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    DOI： 10.1103/physrevb.92.144403

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  • Modulation of ferromagnetism in(In,Fe)Asquantum wells via electrically controlled deformation of the electron wave functions Reviewed International journal

    Le Duc Anh, Pham Nam Hai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    Physical Review B   92 ( 16 )   161201(R)   2015.10

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    DOI： 10.1103/physrevb.92.161201

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  • Memristive magnetic tunnel junctions with MnAs nanoparticles Reviewed International journal

    Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   107 ( 12 )   122404 - 122404   2015.9

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    DOI： 10.1063/1.4931141

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  • Optical and Magnetic Microstructures in YIG Ferrite Fabricated by Femtosecond Laser Reviewed International journal

    Atsushi Ishikawa

    Journal of Laser Micro/Nanoengineering   10 ( 1 )   48 - 52   2015.2

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    DOI： 10.2961/jlmn.2015.01.0010

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  • Growth and characterization of insulating ferromagnetic semiconductor (Al,Fe)Sb Reviewed International journal

    Le Duc Anh, Daiki Kaneko, Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   107 ( 23 )   232405 - 232405   2015

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    DOI： 10.1063/1.4937142

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  • (Ga,Fe)Sb: A p-type ferromagnetic semiconductor Reviewed International journal

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Applied Physics Letters   105 ( 13 )   132402 - 132402   2014.9

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    DOI： 10.1063/1.4896539

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  • High-field electroluminescence in semiconductor tunnel junctions with a Mn-doped GaAs layer Reviewed International journal

    Pham Nam Hai, Takashi Yatsui, Motoichi Ohtsu, Masaaki Tanaka

    Journal of Applied Physics   116 ( 11 )   113905 - 113905   2014.9

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    DOI： 10.1063/1.4895700

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  • Spin and orbital magnetic moments of Fe in the n-type ferromagnetic semiconductor (In,Fe)As Reviewed International journal

    M. Kobayashi, L. D. Anh, P. N. Hai, Y. Takeda, S. Sakamoto, T. Kadono, T. Okane, Y. Saitoh, H. Yamagami, Y. Harada, M. Oshima, M. Tanaka, A. Fujimori

    Applied Physics Letters   105 ( 3 )   032403 - 032403   2014.7

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    DOI： 10.1063/1.4890733

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  • Interplay between strain, quantum confinement, and ferromagnetism in strained ferromagnetic semiconductor (In,Fe)As thin films Reviewed International journal

    Daisuke Sasaki, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   104 ( 14 )   142406 - 142406   2014.4

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    DOI： 10.1063/1.4870970

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  • Visible-light electroluminescence in Mn-doped GaAs light-emitting diodes Reviewed International journal

    Pham Nam Hai, Daiki Maruo, Masaaki Tanaka

    Applied Physics Letters   104 ( 12 )   122409 - 122409   2014.3

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    DOI： 10.1063/1.4869576

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  • Electronic Excitations of a Magnetic Impurity State in the Diluted Magnetic Semiconductor (Ga,Mn)As Reviewed International journal

    M. Kobayashi, H. Niwa, Y. Takeda, A. Fujimori, Y. Senba, H. Ohashi, A. Tanaka, S. Ohya, P. N. Hai, M. Tanaka, Y. Harada, M. Oshima

    Physical Review Letters   112 ( 10 )   107203   2014.3

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    DOI： 10.1103/physrevlett.112.107203

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  • Publishers Note: “Recent progress in III-V based ferromagnetic semiconductors: Band structure, Fermi level, and tunneling transport” [Appl. Phys. Rev. 1, 011102 (2014)] Reviewed

    Masaaki Tanaka, Shinobu Ohya, Pham Nam Hai

    Applied Physics Reviews   1 ( 1 )   019901 - 019901   2014.3

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    DOI： 10.1063/1.4863688

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  • Recent progress in III-V based ferromagnetic semiconductors: Band structure, Fermi level, and tunneling transport Reviewed International journal

    Masaaki Tanaka, Shinobu Ohya, Pham Nam Hai

    Applied Physics Reviews   1 ( 1 )   011102 - 011102   2014.3

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    DOI： 10.1063/1.4840136

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  • Epitaxial growth and characterization of n-type magnetic semiconductor (In,Co)As Reviewed International journal

    Nguyen Thanh Tu, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    Japanese Journal of Applied Physics   53 ( 4S )   04EM05   2014.1

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    DOI： 10.7567/jjap.53.04em05

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  • Three-dimensional nanostructuring in YIG ferrite with femtosecond laser Reviewed International journal

    Tomohiro Amemiya, Atsushi Ishikawa, Yuya Shoji, Pham Nam Hai, Masaaki Tanaka, Tetsuya Mizumoto, Takuo Tanaka, Shigehisa Arai

    OPTICS LETTERS   39 ( 2 )   212 - 215   2014.1

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    DOI： 10.1364/OL.39.000212

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  • Control of ferromagnetism by manipulating the carrier wavefunction in ferromagnetic semiconductor (In,Fe)As quantum wells Reviewed International journal

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    APPLIED PHYSICS LETTERS   104 ( 4 )   042404   2014.1

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    DOI： 10.1063/1.4863214

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  • Effects of laser irradiation on the self-assembly of MnAs nanoparticles in a GaAs matrix Reviewed International journal

    Pham Nam Hai, Wataru Nomura, Takashi Yatsui, Motoichi Ohtsu, Masaaki Tanaka

    Applied Physics Letters   101 ( 19 )   193102 - 193102   2012.11

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    DOI： 10.1063/1.4765355

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  • Growth and characterization of n-type electron-induced ferromagnetic semiconductor (In,Fe)As Reviewed International journal

    Pham Nam Hai, Le Duc Anh, Shyam Mohan, Tsuyoshi Tamegai, Masaya Kodzuka, Tadakatsu Ohkubo, Kazuhiro Hono, Masaaki Tanaka

    Applied Physics Letters   101 ( 18 )   182403 - 182403   2012.10

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    DOI： 10.1063/1.4764947

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  • Crystalline anisotropic magnetoresistance with two-fold and eight-fold symmetry in (In,Fe)As ferromagnetic semiconductor Reviewed International journal

    Pham Nam Hai, Daisuke Sasaki, Le Duc Anh, Masaaki Tanaka

    Applied Physics Letters   100 ( 26 )   262409 - 262409   2012.6

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    DOI： 10.1063/1.4730955

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  • Magnetoresistance enhanced by inelastic cotunneling in a ferromagnetic MnAs nanoparticle sandwiched by nonmagnetic electrodes Reviewed International journal

    Ryota Akiyama, Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    Journal of Applied Physics   111 ( 6 )   063716 - 063716   2012.3

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    DOI： 10.1063/1.3695990

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  • Electron effective mass in n-type electron-induced ferromagnetic semiconductor (In,Fe)As: Evidence of conduction band transport Reviewed International journal

    Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Applied Physics Letters   101 ( 25 )   252410 - 252410   2012

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    DOI： 10.1063/1.4772630

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  • Structural and magnetic properties of Ge1−xMnx thin films grown on Ge (001) substrates Reviewed International journal

    Shinsuke Yada, Pham Nam Hai, Satoshi Sugahara, Masaaki Tanaka

    Journal of Applied Physics   110 ( 7 )   073903 - 073903   2011.10

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    DOI： 10.1063/1.3638701

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  • Phase decomposition diagram of magnetic alloy semiconductor Reviewed International journal

    Pham Nam Hai, Shinsuke Yada, Masaaki Tanaka

    Journal of Applied Physics   109 ( 7 )   073919 - 073919   2011.4

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    DOI： 10.1063/1.3567112

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  • Long spin-relaxation time in a single metal nanoparticle. Reviewed International journal

    Hai PN, Ohya S, Tanaka M

    Nature nanotechnology   5 ( 8 )   593 - 596   2010.8

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    DOI： 10.1038/nnano.2010.130

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  • Valence-band structure of the ferromagnetic semiconductor GaMnAs studied by spin-dependent resonant tunneling spectroscopy. International journal

    Shinobu Ohya, Iriya Muneta, Pham Nam Hai, Masaaki Tanaka

    Phys. Rev. Lett.   104 ( 16 )   167204 - 167204   2010.4

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    The valence-band structure and the Fermi level (E(F)) position of ferromagnetic-semiconductor GaMnAs are quantitatively investigated by electrically detecting the resonant tunneling levels of a GaMnAs quantum well (QW) in double-barrier heterostructures. The resonant level from the heavy-hole first state is clearly observed in the metallic GaMnAs QW, indicating that holes have a high coherency and that E(F) exists in the band gap. Clear enhancement of tunnel magnetoresistance induced by resonant tunneling is demonstrated in these double-barrier heterostructures.

    DOI： 10.1103/PhysRevLett.104.167204

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  • Valence-Band Structure of the Ferromagnetic Semiconductor GaMnAs Studied by Spin-Dependent Resonant Tunneling Spectroscopy Reviewed

    Shinobu Ohya, Iriya Muneta, Pham Nam Hai, Masaaki Tanaka

    Physical Review Letters   104 ( 16 )   2010.4

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    DOI： 10.1103/physrevlett.104.167204

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  • Electromotive force and huge magnetoresistance in magnetic tunnel junctions Reviewed International journal

    Pham Nam Hai, Shinobu Ohya, Masaaki Tanaka, Stewart E. Barnes, Sadamichi Maekawa

    Nature   458 ( 7237 )   489 - 492   2009.3

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    DOI： 10.1038/nature07879

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  • Spin dependent transport phenomena in III-V semiconductor heterostructures with ferromagnetic MnAs nano-scale particles

    Pham Nam Hai

    2009.3

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  • GaMnAs-based magnetic tunnel junctions with an AlMnAs barrier Reviewed International journal

    Shinobu Ohya, Iriya Muneta, Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   95 ( 24 )   242503 - 242503   2009

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    DOI： 10.1063/1.3254218

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  • Spin-valve effect by ballistic transport in ferromagnetic metal (MnAs)/semiconductor (GaAs) hybrid heterostructures Reviewed

    Pham Nam Hai, Yusuke Sakata, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    PHYSICAL REVIEW B   77 ( 21 )   2008.6

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    DOI： 10.1103/PhysRevB.77.214435

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  • Spin-valve effect by ballistic transport in ferromagnetic metal (MnAs)/semiconductor (GaAs) hybrid heterostructures Reviewed International journal

    Pham Nam Hai, Yusuke Sakata, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    Physical Review B   77 ( 21 )   214435   2008.6

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    DOI： 10.1103/physrevb.77.214435

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  • Nature of Magnetic Coupling between Mn Ions in As-GrownGa1−xMnxAsStudied by X-Ray Magnetic Circular Dichroism Reviewed International journal

    Y. Takeda, M. Kobayashi, T. Okane, T. Ohkochi, J. Okamoto, Y. Saitoh, K. Kobayashi, H. Yamagami, A. Fujimori, A. Tanaka, J. Okabayashi, M. Oshima, S. Ohya, P. N. Hai, M. Tanaka

    Physical Review Letters   100 ( 24 )   247202   2008.6

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    DOI： 10.1103/physrevlett.100.247202

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  • Properties and Functionalities of MnAs/III-V Hybrid and Composite Structures Reviewed

    Masaaki Tanaka, Masafumi Yokoyama, Pham Nam Hai, Shinobu Ohya

    SPINTRONICS   82   455 - 485   2008

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    DOI： 10.1016/S0080-8784(08)00011-2

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  • Reconfigurable Logic Gates Using Single-Electron Spin Transistors Reviewed International journal

    Pham Nam Hai, Satoshi Sugahara, Masaaki Tanaka

    Japanese Journal of Applied Physics   46 ( 10A )   6579 - 6585   2007.10

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    DOI： 10.1143/jjap.46.6579

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  • 154-μm TM-mode waveguide optical isolator based on the nonreciprocal-loss phenomenon: device design to reduce insertion loss Reviewed International journal

    T. Amemiya, H. Shimizu, M. Yokoyama, P. N. Hai, M. Tanaka, Y. Nakano

    Applied Optics   46 ( 23 )   5784 - 5784   2007.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Optical Society  

    DOI： 10.1364/ao.46.005784

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  • 1.54-mu m TM-mode waveguide optical isolator based on the nonreciprocal-loss phenomenon: device design to reduce insertion loss Reviewed

    T. Amemiya, H. Shimizu, M. Yokoyama, P. N. Hai, M. Tanaka, Y. Nakano

    APPLIED OPTICS   46 ( 23 )   5784 - 5791   2007.8

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  • Quantum size effect and tunneling magnetoresistance in ferromagnetic-semiconductor quantum heterostructures Reviewed

    Shinobu Ohya, Pham Nam Hai, Yosuke Mizuno, Masaaki Tanaka

    Physical Review B   75 ( 15 )   2007.4

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    DOI： 10.1103/physrevb.75.155328

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  • Quantum size effect and tunneling magnetoresistance in ferromagnetic-semiconductor quantum heterostructures Reviewed International journal

    Shinobu Ohya, Pham Nam Hai, Yosuke Mizuno, Masaaki Tanaka

    PHYSICAL REVIEW B   75 ( 15 )   155328   2007.4

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    DOI： 10.1103/PhysRevB.75.155328

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  • Spin-dependent transport properties in GaMnAs-based spin hot-carrier transistors Reviewed International journal

    Yosuke Mizuno, Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   90 ( 16 )   162505 - 162505   2007.4

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    DOI： 10.1063/1.2724771

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  • Magnetic properties of MnAs nanoclusters embedded in a GaAs semiconductor matrix Reviewed International journal

    Pham Nam Hai, Keisuke Takahashi, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    Journal of Magnetism and Magnetic Materials   310 ( 2 )   1932 - 1934   2007.3

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    DOI： 10.1016/j.jmmm.2006.10.766

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  • Nonreciprocal propagation of light without external magnetic fields in a semiconductor waveguide isolator with a MnAs layer Reviewed International journal

    T. Amemiya, H. Shimizu, P.N. Hai, M. Tanaka, Y. Nakano

    Journal of Magnetism and Magnetic Materials   310 ( 2 )   2161 - 2163   2007.3

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    DOI： 10.1016/j.jmmm.2006.11.039

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  • Waveguide-Based 1.5 µm Optical Isolator Based on Magneto-Optic Effect in Ferromagnetic MnAs Reviewed International journal

    Tomohiro Amemiya, Hiromasa Shimizu, Pham Nam Hai, Masafumi Yokoyama, Masaaki Tanaka, Yoshiaki Nakano

    Japanese Journal of Applied Physics   46 ( 1 )   205 - 210   2007.1

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    DOI： 10.1143/jjap.46.205

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  • Semiconductor waveguide optical isolator based on nonreciprocal loss induced by ferromagnetic MnAs Reviewed International journal

    T. Amemiya, H. Shimizu, Y. Nakano, P. N. Hai, M. Yokoyama, M. Tanaka

    Applied Physics Letters   89 ( 2 )   021104 - 021104   2006.7

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    DOI： 10.1063/1.2220016

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  • Spin polarized tunneling in III–V-based heterostructures with a ferromagnetic MnAs thin film and GaAs:MnAs nanoclusters Reviewed

    Pham Nam Hai, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    Physica E: Low-dimensional Systems and Nanostructures   32 ( 1-2 )   416 - 418   2006.5

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    DOI： 10.1016/j.physe.2005.12.082

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  • Spin dependent tunneling in heterostructures with ferromagnetic MnAs nano-scale particlesand its applications

    Namhai Pham

    2006.3

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  • Resonant tunneling effect and tunneling magnetoresistance in GaMnAs quantum-well double-barrier heterostructures Reviewed International journal

    S. Ohya, P. N. Hai, Y. Mizuno, M. Tanaka

    physica status solidi (c)   3 ( 12 )   4184 - 4187   2006

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1002/pssc.200672882

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  • Tunneling magnetoresistance of MnAs thin film/GaAs∕AlAs∕GaAs:MnAs nanoclusters and its AlAs barrier thickness dependence Reviewed International journal

    Pham Nam Hai, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    Applied Physics Letters   89 ( 24 )   242106 - 242106   2006

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    DOI： 10.1063/1.2405399

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  • Resonant tunneling effect and tunneling magnetoresistance in GaMnAs quantum-well double-barrier heterostructures Reviewed

    S. Ohya, P. N. Hai, Y. Mizuno, M. Tanaka

    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 12   3 ( 12 )   4184 - 4187   2006

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  • TM mode optical waveguide isolator with 8.8 dB/mm nonreciprocal propagation induced by ferromagnetic MnAs Reviewed

    T. Amemiya, H. Shimizu, Y. Nakano, P. N. Hai, M. Yokoyama, M. Tanaka

    2006 OPTICAL FIBER COMMUNICATION CONFERENCE/NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, VOLS 1-6   2310 - +   2006

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    DOI： 10.1109/ofc.2006.215931

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  • Tunneling magnetoresistance in GaMnAs∕AlAs∕InGaAs∕AlAs∕GaMnAs double-barrier magnetic tunnel junctions Reviewed

    Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    Applied Physics Letters   87 ( 1 )   012105 - 012105   2005.7

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    DOI： 10.1063/1.1978976

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  • 強磁性半導体GaMnAsを用いたIII-V族半導体量子ヘテロ構造のスピン依存垂直方向伝導特性

    ファム ナム ハイ

    2004.3

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MISC

  • 強磁性半導体ルネサンス : Fe添加Ⅲ-Ⅴ族強磁性半導体がもたらす新展開

    レデゥック アイン, グエンタン トゥ, 瀧口 耕介, 小林 正起, ファムナム ハイ, 田中 雅明

    固体物理 / アグネ技術センター [編]   58 ( 2 )   67 - 80   2023.2

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  • Recording and driving of magnetic domains in Co/Tb magnetic nanowires and application of topological insulator Reviewed

    Yasuyoshi Miyamoto, Daisuke Kato, Mao Takahashi, Kei Ogura, Yoshinori Iguchi, Pham Nam Hai

    IEICE Technical Report   46 ( 40 )   17 - 22   2022.12

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  • トポロジカル絶縁体スピントロニクス—Topological Insulator Spintronics—スピントロニクスの最前線 Reviewed

    ファム ナム ハイ

    応用電子物性分科会誌 = Bulletin of solid state physics and applications / 応用物理学会応用電子物性分科会 編   25 ( 5 )   173 - 178   2019

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  • Fe-doped ferromagnetic semiconductors and their device applications

    PHAM Nam Hai, LE Duc Anh, NGUYEN Thanh Tu, TANAKA Masaaki

    Oyo Buturi   87 ( 10 )   754 - 758   2018.10

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    We review recent studies of a new class of Fe-doped III-V ferromagnetic semiconductors (FMS). We first briefly summarize the history of FMS studies, and point out the unsolved problems of the most intensively studied Mn-doped III-V FMSs such as (GaMn)As. We then discuss the possibility and prospects of using Fe as a magnetic impurity in narrow-gap III-V semiconductors to realize a new family of FMSs that can solve all the problems of Mn-doped FMSs. We describe the crystal growth, detailed structural characterizations, and fundamental magnetic properties of n-type (InFe)As, p-type (GaFe)Sb, and n-type (InFe)Sb. We discuss possible applications of these Fe-doped FMSs to semiconductor spin devices.

    DOI： 10.11470/oubutsu.87.10_754

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    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16H02095/

  • International students from Vietnam: Past, present and future

    PHAM Nam Hai

    Oyo Buturi   85 ( 3 )   234 - 235   2016.3

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    DOI： 10.11470/oubutsu.85.3_234

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  • Comment on "Reconciling results of tunnelling experiments on (Ga,Mn)As" arXiv:1102.3267 by Dietl and Sztenkiel

    Shinobu Ohya, Kenta Takata, Iriya Muneta, Pham Nam Hai, Masaaki Tanaka

    (comment paper in arXiv)   2011.2

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  • Spin-dependent resonant tunneling effect in ferromagnetic-semiconductor quantum heterostructures Reviewed

    OHYA S., HAI P. N., TANAKA M.

    Bulletin of Topical Symposium of the Magnetics Society of Japan   159   25 - 29   2008.3

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  • TM mode waveguide optical isolator based on the nonreciprocal loss induced by ferromagnetic MnAs

    AMEMIYA Tomohiro, SHIMIZU Hiromasa, Hai P. N, YOKOYAMA Masafumi, TANAKA Masaaki, NAKANO Yoshiaki

    Technical report of IEICE. OPE   106 ( 435 )   19 - 22   2006.12

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    Waveguide optical isolator for 1.5μm TM mode was developed. The device consists of an InGaAlAs/InP semiconductor optical amplifier covered with a ferromagnetic MnAs layer. The combination of the optical waveguide and the magnetized ferromagnetic metal layer produces a magneto-optic effect called the nonreciprocal loss-a phenomenon where the propagation loss of light is larger in backward than in forward propagation. Based on this phenomenon, we fabricated a ridge waveguide device and obtained its single-mode operation with a small insertion loss (〜10dB). The device showed a stable isolation performance of 7.2 dB/mm from 1.53μm to 1.55μm.

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Presentations

  • [Invited] IC design for AI, AI for IC design, and Marketing Invited

    Pham Nam Hai

    FPT Japan Seminar RE:ENGINEER: AI × Semiconductors – The New Paradigm  2026.10 

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  • Nonreciprocity of Domain-Wall Motion Induced by Interlayer Dzyaloshinskii–Moriya Interaction in Magnetic Wire

    Kota Sato, Shixuan Liang, Ruiyue Chu, Lei Han, Ho Hoang Huy, Pham Nam Hai, Cheng Song

    VJSS 2026  2026.9 

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  • High Curie temperature up to 500 K in n-type ferromagnetic semiconductor (In,Fe)Sb grown on vicinal GaAs substrates

    Shuzo Oeda, Masaaki Tanaka, Pham Nam Hai

    VJSS 2026  2026.9 

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  • Top-BiSb SOT-MRAM With a Conductive RuOx Interlayer for CMOS BEOL Process Compatibility

    Pham Van Thuan, Ho Hoang Huy, Ohiro Fujie, Pham Nam Hai

    VJSS 2026  2026.9 

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  • Investigation of Perpendicular Magnetic Anisotropy in Full ALD Pt/Co Bilayers for Three-Dimensional Race Track Memory

    Kosei Tsureo, Kota Sato, Hu Yifan, Yuri Kishimoto, Pham Nam Hai

    VJSS 2026  2026.9 

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  • Simulation of compute-in-memory (CIM) errors caused by variations in SOT-MRAM resistance

    Yuki Osada, Pham Nam Hai

    VJSS 2026  2026.9 

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  • [Invited] Edge AI semiconductor: from materials to system integration Invited

    Pham Nam Hai

    VJSS 2026  2026.9 

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  • Highly effective and field-free spin-orbit torque switching of CoFeB/MgO using hybrid in-plane ferromagnet/BiSb topological insulator

    Ho Hoang Huy, Pham Nam Hai

    VJSS 2026  2026.9 

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  • A new half-Heusler topological semimetal with high spin Hall conductivity and low surface roughness for SOT – MRAM applications

    Trinh Dai Hoang Long, Ho Hoang Huy, Pham Nam Hai

    VJSS 2026  2026.9 

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  • Giant Perpendicular Magnetic Anisotropy in Mo/CoFeB/MgAl2O4 Multilayers for 5 nm CMOS process compatibility

    Daiki Ito, Kosei Tsureo, Sho Kagami, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    SSDM 2026  2026.9 

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  • Manufacturable Top-BiSb SOT-MRAM Using a Conductive RuOx Interlayer

    Pham Van Thuan, Ho Hoang Huy, Pham Nam Hai

    The 87th JSAP Autumn Meeting 2026  2026.9 

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sapporo  

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  • Highly effective and external-field-free spin-orbit torque switching of CoFeB/MgO using hybrid in-plane ferromagnet/BiSb topological insulator

    Ho Hoang Huy, Pham Nam Hai

    The 87th JSAP Autumn Meeting 2026  2026.9 

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    Venue：Sapporo  

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  • A new half-Heusler topological semimetal for SOT – MRAM applications with improved spin Hall conductivity and low surface roughness

    Trinh Dai Hoang Long, Ho Hoang Huy, Pham Nam Hai

    The 87th JSAP Autumn Meeting 2026  2026.9 

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sapporo  

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  • BEOL-Compatible Topological Semimetal YPtBi with High Spin-Orbit Torque Efficiency Enabled by Berry-Phase Monopole Engineering

    Sho Kagami, Ohiro Fujie, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    The 87th JSAP Autumn Meeting 2026  2026.9 

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    Event date： 2026.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sapporo  

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  • Enhanced spin Hall conductivity at high temperature in TaSi2 driven by Berry-phase monopoles

    Ken Ishida, Takanori Shirokura, Pham Nam Hai

    The 87th JSAP Autumn Meeting 2026  2026.9 

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    Event date： 2026.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sapporo  

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  • Optical constants (n, κ) and absorption of BiSb topological insulator in Mid-infrared region measured by RT technique International conference

    Hajime Nishiyama, Pham Nam Hai, Tomohiro Amemiya, Shun Hashiyada, Yukio Kawano

    The 37th International Conference on the Physics of Semiconductors 2026  2026.8 

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    Event date： 2026.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Demonstration of MIR detector using sputter-fabricated BiSb topological insulator film International conference

    Hajime Nishiyama, Pham Nam Hai, Yukio Kawano

    The 37th International Conference on the Physics of Semiconductors 2026  2026.8 

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    Event date： 2026.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Large anomalous Nernst effect in room-temperature ferromagnetic semiconductor (In,Fe)Sb International conference

    Pham Nam Hai, Kota Ejiri, Wentao Li, Shuzo Oeda, Yun Jaeyeon, Masaaki Tanaka

    The 37th International Conference on the Physics of Semiconductors 2026  2026.8 

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    Event date： 2026.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • [Invited] Topological Insulator-Based Spin-Orbit Torque Magnetic Sensor for 4Tbit/inch2 Magnetic Recording Technology Invited International conference

    Pham Nam Hai

    ISAMMA 2026  2026.6 

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    Event date： 2026.6 - 2026.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Busan  

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  • Manufactorable BiSb top structure for ultrafast and ultralow power SOT-MRAM

    Pham Van Thuan, Ho Hoang Huy, Pham Nam Hai

    2026 IEEE Magnetics Society Summer School  2026.6 

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    Event date： 2026.6

    Language：English   Presentation type：Poster presentation  

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  • [Invited] Quantum Materials for High Performance Spin Orbit Torque Devices Invited International conference

    Pham Nam Hai

    ICMIT 2026  2026.6 

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    Venue：Hanoi  

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  • Large Spin Hall Angle in Highly-Textured Sputtered BiSb (012) Topological Insulator on Si/SiO2 Substrates Enabled by Buffer/Seed Stack

    Ho Hoang Huy, Li Wentao, Pham Van Thuan, Shigeyuki Hirayama, Yushi Kato, Pham Nam Hai

    Intermag 2026  2026.4 

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    Event date： 2026.4

    Language：English   Presentation type：Poster presentation  

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  • Giant Perpendicular Magnetic Anisotropy in Mo / Boron-rich CoFeB / MgAl2O4 Junction for p-MTJ integration to 5-7 nm CMOS Processes

    Sho Kagami, Zhang Ruixian, Daiki Ito, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    Intermag 2026  2026.4 

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    Event date： 2026.4

    Language：English   Presentation type：Poster presentation  

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  • RT法によるBiSbの⾚外光学定数および吸収の評価

    西山黎, ファム ナムハイ, 雨宮 智宏, 橋⾕田 俊, 河野 ⾏雄

    第73回応用物理学会春季節学術講演会  2026.3 

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    Event date： 2026.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • トポロジカル絶縁体BiSbを⽤いた中⾚外検出の検証

    西山黎, ファム ナムハイ, 河野 ⾏雄

    第73回応用物理学会春季節学術講演会  2026.3 

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    Event date： 2026.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Giant Perpendicular Magnetic Anisotropy in Mo/CoFeB/MgAl2O4 Multilayers

    Daiki Ito, Zhang Ruixian, Sho Kagami, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    The 73th JSAP Spring meeting 2026  2026.3 

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    Event date： 2026.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Giant Perpendicular Magnetic Anisotropy in Mo / Boron-rich CoFeB / MgAl2O4 Heterostructure for p-MTJ integration to 5-7 nm CMOS Processes

    Sho Kagami, Zhang Ruixian, Daiki Ito, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    The 73th JSAP Spring meeting 2026  2026.3 

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    Event date： 2026.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Large anomalous Nernst effect above room temperature in (In,Fe)Sb ferromagnetic semiconductor

    Pham Nam Hai, Kota Ejiri, Li Wentao, Shuzo Oeda, Yun Jaeyeon, Masaaki Tanaka

    The 73th JSAP Spring meeting 2026  2026.3 

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    Event date： 2026.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Enhancement of Curie temperature in (In,Fe)Sb by step-flow growth technique

    Shuzo Oeda, Kota Ejiri, Pham Nam Hai

    The 73th JSAP Spring meeting 2026  2026.3 

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    Event date： 2026.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Large Spin-Orbit Torque Induced by Highly Textured BiSb(012) Topological Insulator Deposited on Si/SiO2 Substrates Using Oxide Buffer/Seed Stack

    Wentao Li, Hoang Huy Ho, Xiaokun Yan, Pham Van Thuan, Shigeyuki Hirayama, Yushi Kato, Pham Nam Hai

    The 73th JSAP Spring meeting 2026  2026.3 

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    Event date： 2026.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Comparison of spin Hall angles of BiSb topological insulator measured by spin accumulation, spin–orbit torque, and spin Hall magnetoresistance

    Min Liu, Ruixian Zhang, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Xiaoyu Xu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    The 73th JSAP Spring meeting 2026  2026.3 

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    Event date： 2026.3

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    Venue：東京  

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  • 層間Dzyaloshinskii–Moriya相互作⽤に起因する、スピン軌道トルク駆動ドメ インウォール運動の一⽅向性異⽅

    佐藤 虹太, Shixuan Liang, Ho Hoang Huy, Pham Nam Hai, Cheng Song

    第73回応用物理学会春季節学術講演会  2026.3 

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    Event date： 2026.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • (Keynote) Spintronic Materials For Ultralow Power Edge AI Invited

    Pham Nam Hai

    VANJ 2025  2025.12 

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    Event date： 2025.12

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Topological materials: from fundamental researches to industrial applications Invited International conference

    Pham Nam Hai

    Seminar at Department of Materials, TsingHua University  2025.11 

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    Event date： 2025.11

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Beijing  

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  • Large spin Hall effect in BiSb topological insulator and perpendicularly magnetized CoFeB heterojunctions with oxide buffer and interfacial layers

    P. V. Thuan, H. H. Huy, L. Wentao, S. Takahashi, Y. Kato, S. Hirayama, P. N. Hai

    Science Tokyo SPRING (MD) Retreat 2025  2025.11 

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    Venue：Shizuoka  

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  • (Keynote) From Semiconductor to Topological Spintronics Invited

    Pham Nam Hai

    The 1st Viet Nam-Japan Semiconductor Symposium 2025  2025.10 

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    Event date： 2025.10

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Topological materials: from fundamental researches to industrial applications Invited

    Pham Nam Hai

    International Conference on Nano-World Semiconductor and Sustainable Materials (1st IC-Nanoworld 2025)  2025.9 

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  • Fabrication and Evaluation of Topological Semimetal YPtBi/Ta/CoFeB Junctions with High Spin Hall Angle for SOT-MRAM International conference

    Sho Kagami, Reo Yamamoto, Zhang Ruixian, Ken Ishida, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    SSDM 2025  2025.9 

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    Event date： 2025.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Yokohama  

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  • Large spin Hall effect in BiSb topological insulator and perpendicularly magnetized CoFeB heterojunctions with oxide buffer and interfacial layers

    Pham Van Thuan, Ho Hoang Huy, Li Wentao, S. Takahashi, Y. Kato, S. Hirayama, Pham Nam Hai

    The 86th JSAP Autumn Meeting 2025  2025.9 

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    Event date： 2025.9

    Presentation type：Oral presentation (general)  

    Venue：Nagoya  

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  • (Keynote) Topological materials: from fundamental researches to industrial applications Invited

    Pham Nam Hai

    International Conference on Nano-World Semiconductor and Sustainable Materials (1st IC-Nanoworld 2025)  2025.9 

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    Event date： 2025.9

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Impact of Metal, Oxide, and Hybrid Metal-Oxide Interlayers on Spin Hall Effect in BiSb Topological Insulator and Magnetic Interfaces International conference

    Zhang Ruixian, Quang Le, XiaoYong Liu, Lei Xu, Brian R.York, Cherngye Hwang, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Min Liu, Shota Namba, Pham Nam Hai

    The Magnetic Recording Conference (TMRC 2025)  2025.8 

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    Event date： 2025.7

    Language：English   Presentation type：Poster presentation  

    Venue：Sendai  

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  • (Invited) Device applications of the giant direct and inverse spin Hall effect in BiSb topological insulator Invited International conference

    Pham Nam Hai

    SPIE Spintronics XVIII  2025.8 

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    Event date： 2025.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego  

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  • Impact of Metal, Oxide, and Hybrid Metal-Oxide Interlayers on Spin Hall Effect in BiSb Topological Insulator and Magnetic Interfaces

    Zhang Ruixian, Quang Le, XiaoYong Liu, Lei Xu, Brian R.York, Cherngye Hwang, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Min Liu, Shota Namba, Pham Nam Hai

    The Magnetic Recording Conference (TMRC 2025)  2025.7 

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  • Growth of Highly Textured BiSb Topological Insulator on Si/SiOx substrates for Spin-Orbit Torque Devices Using TiOx/ MgO Buffer Layers International conference

    W. Li, H. Ho Hoang, S. Takahashi, Y. Hirayama, Y. Kato, P. N. Hai

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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    Event date： 2025.4

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Okinawa  

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  • Spin Hall effect in Platinum deposited by atomic layer deposition for 3D spin-orbit torque devices International conference

    P. N. Hai, K. Ishida, K. Sato

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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    Event date： 2025.4

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Okinawa  

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  • Spin Hall sensor using topological insulator International conference

    M. Liu, R. Zhang, Q. Le, B. York, C. Hwang, X. Liu, M. Gribelyuk, X. Xu, S. Le, M. Maeda, F. Tuo, Y. Tao, H. Takano, P. N. Hai

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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    Event date： 2025.4

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Okinawa  

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  • Role of Pt and Bi on the giant spin Hall effect in topological semimetal YPtBi International conference

    S. Kagami, O. Fujie, D. Ito, Q. Le, B. York, C. Hwang, X. Liu, S. Le, M. Maeda, T. Fan, Y. Tao, H. Takano, P. N. Hai

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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    Event date： 2025.4

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    Venue：Okinawa  

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  • Growth of Co thin Films with Low Roughness by ALD for 3D Magnetic Memory International conference

    Y. Hu, K. Sato, R. Zhang, K. Ishida, P. N. Hai

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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    Event date： 2025.4

    Language：English   Presentation type：Poster presentation  

    Venue：Okinawa  

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  • Doped BiSbX Topological Insulator For Spin-Orbit Torque Devices

    F. Tuo, Q. Le, B. R. York, C. Hwang, X. Liu, M. A. Gribelyuk, S. Le, L. Xu, J. James, J. Ortega, M. Maeda, Y. Tao, H. Takano, M. Liu, R. Zhang, S. Namba, P. N. Hai.

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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  • Growth of Highly Textured BiSb Topological Insulator on Si/SiOx substrates for Spin-Orbit Torque Devices Using TiOx/ MgO Buffer Layers

    W. Li, H. Ho Hoang, S. Takahashi, Y. Hirayama, Y. Kato, P. N. Hai

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.4 

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  • Effect of Pt and Bi on the spin Hall angle in topological semimetal YPtBi

    Sho Kagami, Ohiro Fujie, Daiki Ito, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    The 72th JSAP Spring meeting 2025  2025.3 

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    Event date： 2025.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Spin Hall effect in Platinum deposited by atomic layer deposition for 3D magnetic race-track memory

    Pham Nam Hai, Ishida Ken, Kota Sato

    The 72th JSAP Spring meeting 2025  2025.3 

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    Event date： 2025.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • High performance spin Hall sensing device using BiSb topological insulator

    MIN LIU, Ruixian Zhang, Quang Le, Brian York, Cherngye Hwang, Xiaoyong Liu, Michael Gribelyuk, Xiaoyu Xu, Son Le, Maki Maeda, Tuo Fan, Yu Tao, Hisashi Takano, Pham Nam Hai

    The 72th JSAP Spring meeting 2025  2025.3 

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    Event date： 2025.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Study of Metal, Oxide, and Hybrid Metal-Oxide Interlayers for optimizing Spin-Orbit torque in BiSb Topological Insulator and Magnetic Interfaces

    Ruixian Zhang, Quang Le, Xiaoyong Liu, Lei Xu, Brian R. York, Cherngye Hwang, Son Le, Maki Maeda, Fan Tuo, Hisashi Takano, Min Liu, Shota Namba, Pham Nam Hai

    The 72th JSAP Spring meeting 2025  2025.3 

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    Event date： 2025.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Doped BiSbX Topological Insulator For Spin-Orbit Torque Devices International conference

    F. Tuo, Q. Le, B. R. York, C. Hwang, X. Liu, M. A. Gribelyuk, S. Le, L. Xu, J. James, J. Ortega, M. Maeda, Y. Tao, H. Takano, M. Liu, R. Zhang, S. Namba, P. N. Hai

    International Conference of Asian Union of Magnetics Societies (IcAUMS 2025)  2025.2 

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    Event date： 2025.4

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Okinawa  

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  • Large spin orbit torque induced by high temperature annealed BiSb topological insulator on oxidized Si substrates International conference

    Hoang Huy Ho, Wentao Li, Shigeki Takahashi, Yoshiyuki Hirayama, Yushi Kato, Pham Nam Hai

    2025 Joint MMM-Intermag  2025.1 

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    Event date： 2025.1

    Language：English   Presentation type：Poster presentation  

    Venue：New Orleans  

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  • 三次元磁性細線メモリに向けた異常ホール効果を⽤いた微細磁性細線における磁壁移動の電気的な評価

    加々美 尚, Pham Nam Hai

    第23回スピントロニクス入門セミナー若手スピントロニクスワークショップ  2024.10 

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    Venue：神戸市  

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  • 三次元磁性細線メモリに向けた異常ホール効果を用いた微細磁性細線における磁壁移動の電気的な評価

    加々美 尚, Pham Nam Hai

    第23回スピントロニクス入門セミナー若手スピントロニクスワークショップ  2024.10 

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  • Spin Hall effect in annealed BiSb topological thin films deposited on Si/SiOx substrates

    H. H. Huy, L. Wentao, S. Takahashi, Y. Hirayama, Y. Kato, P. N. Hai

    The 85th JSAP Autumn Meeting 2024  2024.9 

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  • Growth and evaluation of highly textured BiSb(001) topological insulator on Si/SiOx

    L. Wentao, H. H. Huy, S. Takahashi, Y. Hirayama, Y. Kato, P. N. Hai

    The 85th JSAP Autumn Meeting 2024  2024.9 

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  • Very high Curie temperature (530 K) in (Ga,Fe)Sb ferromagnetic semiconductor grown by step-flow mode on vicinal GaAs substrates

    Pham Nam Hai, Ken Takabayashi, Kota Ejiri, Masaaki Tanaka

    The 23rd International Conference on Molecular-Beam Epitaxy (ICMBE2024)  2024.9 

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  • New method for suppression of magnetic domain wall shift error in 3D magnetic domain-wall memory

    Pham Nam Hai, Takanori Shirokura, Nguyen Huynh Duy Khang

    SSDM 2024  2024.9 

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  • Detection of Fe-induced impurity band in Bi-doped (InFe)(SbBi) ferromagnetic semiconductor using infrared magnetic circular dichroism spectroscopy

    Kota Ejiri, Yota Endo, Kenta Takabayashi, Masaaki Tanaka, Pham Nam Hai

    The 5th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2024)  2024.8 

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  • (Keynote) A new class of Fe-doped III-V ferromagnetic semiconductors with high Curie temperature and their quantum heterostructures Invited

    Masaaki Tanaka, Kosuke Takiguchi, Nguyen Thanh Tu, Le Duc Anh, Pham Nam Hai

    The 5th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2024)  2024.8 

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  • (Invited) Topological materials for advanced magnetic memory and sensor Invited

    Pham Nam Hai

    The 5th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2024)  2024.8 

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  • (Invited) A new class of Fe-doped III-V ferromagnetic semiconductors with high Curie temperatures and their quantum heterostructures Invited

    Masaaki Tanaka, Kosuke Takiguchi, Nguyen Thanh Tu, Le Duc Anh, Pham Nam Hai

    36th International Conference on the Physics of Semiconductors (ICPS) 2024  2024.7 

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  • High spin Hall angle in heterostructures of BiSb topological insulator and perpendicularly magnetized CoFeB/MgO multilayers with metallic interfacial layers International conference

    Z. Ruixian, H. H. Huy, Q. Le, B. York, C. Hwang, X. Liu, M. Gribelyuk, X. Xu, S. Le, M. Maeda, F. Tuo, Y. Tao, H. Takano, T. Shirokura, P. N. Hai

    The 22nd International Conference on Magnetism (ICM2024)  2024.6 

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    Event date： 2024.6 - 2024.7

    Language：English   Presentation type：Poster presentation  

    Venue：Bologna  

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  • Large inverse spin Hall effect in BiSb topological insulator for beyond 4 TB/In2 magnetic recording technology International conference

    H. H. Huy, J. Sasaki, N. H. D. Khang, S. Namba, P. N. Hai, Q. Le, B. York, C. Hwang, X. Liu, M. Gribelyuk, X. Xu, S. Le, M. Ho, H. Takano

    IEEE Magnetics Society Summer School 2024  2024.6 

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    Event date： 2024.6

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  • Giant spin Hall effect in sputtered topological semimetal YPtBi films grown at low temperature

    Takanori Shirokura, Pham Nam Hai

    The 71th JSAP Spring Meeting 2024  2024.3 

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  • トポロジカル絶縁体BiSbのテラヘルツ分光特性

    西山 黎, ファムナム ハイ, 橋谷田 俊, 河野 行雄

    第71回応用物理学会春季学術講演会  2024.3 

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  • Observation of impurity band in (InFe)(SbBi) ferromagnetic semiconductor using infrared magnetic circular dichroism spectroscopy

    Kota Ejiri, Yota Endo, Kenta Takabayasi, Masaaki Tanaka, Pham Nam Hai

    The 71th JSAP Spring Meeting 2024  2024.3 

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  • High spin Hall performance in YPtBi topological semimetal and perpendicular-anisotropy CoFeB junctions

    Reo Yamamoto, Takanori Shirokura, Pham Nam Hai

    The 71th JSAP Spring Meeting 2024  2024.3 

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  • High spin Hall angle in BiSb topological insulator and perpendicularly magnetized CoFeB/MgO multilayers with metallic interfacial layers

    Ruixian Zhang, Ho Hoang Huy, Takanori Shirokura, Pham Nam Hai, Quang Le, Brian R. York, Cherngye Hwang, Xiaoyong Liu, Xiaoyu Xu, Son Le, Michael Gribelyuk, Hisashi Takano, Maki Maeda, Fan Tuo, Yu Tao

    The 71th JSAP Spring Meeting 2024  2024.3 

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  • Interface Topological States in a Bi/MnGa Heterostructure

    M. Kobayashi, N. H., D. Khang, T. Takeda, K. Araki, R. Okano, M. Suzuki, K. Kuroda, K. Yaji, K. Sugawara, S. Souma, K. Nakayama, M. Kitamura, K. Horiba, A. Fujimori, T. Sato, S. Shin, M. Tanaka, Pham Nam Hai

    Symposium of the Spintronics Research Network of Japan (Spin-RNJ 2023)  2024.3 

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  • Growth and evaluation of BiSb topological insulator ultrathin films on Si(111) substrates for superconductor/2D-TI topological quantum bits

    Y. Osada, M. Vaßen-Carl, A. R. Jalil, P. Schüffelgen, P. N. Hai

    The 27th Symposium on the Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-27)  2024.3 

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  • Electronic Structure Study of Heterointerface between Topological Insulator and Ferromagnet by Angle-Resolve Photoemission Spectroscopy

    M. Kobayashi, K. Inagaki, P. N. Hai

    CREST領域会議 「トポロジカル材料科学の構築による革新的材料・デバイスの創出」  2024.1 

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  • Large inverse spin Hall effect in BiSb topological insulator and application to SOT magnetic sensor

    H. H. Huy, J. Sasaki, N. H., D. Khang, S. Namba, P. N. Hai

    CREST領域会議 「トポロジカル材料科学の構築による革新的材料・デバイスの創出」  2024.1 

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  • トポロジカル表面状態を用いるスピン軌道トルク磁気メモリの創製

    ファム ナムハイ, 宮本 泰敬, 小林 正起

    CREST領域会議 「トポロジカル材料科学の構築による革新的材料・デバイスの創出」  2024.1 

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  • トポロジカル絶縁体BiSbを適用した磁性細線メモリー

    宮本 泰敬, 加藤 大典, 小倉 渓, 木下 延博, Pham Nam Hai

    CREST領域会議 「トポロジカル材料科学の構築による革新的材料・デバイスの創出」  2024.1 

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  • (Invited) Topological materials for advanced spintronic devices Invited

    Pham Nam Hai

    VANJ Conference 2023  2023.12 

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  • トポロジカル絶縁体BiSbのテラヘルツ吸収特性

    西山 黎, ファム ナム ハイ, 橋谷田 俊, 河野 行雄

    日本光学会年次学術講演会  2023.11 

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  • Interface States between Topological Insulator Bi and Ferromagnet MnGa Observed by Angle-Resolved Photoemission Spectroscopy

    Masaki Kobayashi, Nguyen H. D. Khang, Takahito Takeda, Kohsei Araki, Ryo Okano, Masahiro Suzuki, Kenta Kuroda, Koichiro Yaji, Katsuaki Sugawara, Seigo Souma, Kosuke Nakayama, Miho Kitamura, Koji Horiba, Atsushi Fujimor, Takafumi Sato, Shik Shin, Masaaki Tanaka, Pham Nam Hai

    MRM2023/IUMRS-ICA2023  2023.11 

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  • Large spin Hall effect in BiSb topological insulator/CrOx/CoFeB/MgO with perpendicular magnetic anisotropy for ultralow power SOT-MRAM

    Ho Hoang Huy, Zhang Ruixian, Takanori Shirokura, Shigeki Takahashi, Yoshiyuki Hirayama, Pham Nam Hai

    The 8th International Conference on Applied & Engineering Physics (CAEP-8)  2023.10 

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  • Very high Curie temperature (530 K) in ferromagnetic semiconductor (Ga,Fe)Sb grown on vicinal GaAs(001) substrates

    Kenta Takabayashi, Masaaki Tanaka, Pham Nam Hai

    84th JSAP Autumn meeting  2023.9 

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    Event date： 2023.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Kumamoto  

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  • Suppression of magnetic domain wall shift error in 3D racetrack memory

    Pham Nam Hai, Takanori Shirokura, Nguyen Huynh Duy Khang

    84th JSAP Autumn meeting  2023.9 

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    Event date： 2023.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Kumamoto  

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  • Annealing temperature effects on spin orbit torque in YPtBi topological semimetal and perpendicularly magnetized Co/Pt multilayers

    Sho Kagami, Takanori Shirokura, Pham Nam Hai

    84th JSAP Autumn meeting  2023.9 

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    Event date： 2023.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Kumamoto  

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  • Robust spin Hall effect in non-stoichiometric topological semimetal YPtBi thin films

    Takanori Shirokura, Pham Nam Hai

    84th JSAP Autumn meeting  2023.9 

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    Venue：Kumamoto  

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  • Integration of BiSb topological insulator and CoFeB/MgO with perpendicular magnetic anisotropy using an oxide interfacial layer for ultralow power SOT-MRAM cache memory

    Ho Hoang Huy, R. Zhang, T. Shirokura, S. Takahashi, Y. Hirayama, Pham Nam Hai

    84th JSAP Autumn meeting  2023.9 

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    Event date： 2023.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Kumamoto  

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  • (Invited) Giant spin Hall effect in back-end-of-line compatible topological semimetal YPtBi Invited

    Takanori Shirokura, Pham Nam Hai

    The 4th International Workshop on Advanced Materials and Devices 2023  2023.8 

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  • (Invited) A new class of Fe-doped III-V ferromagnetic semiconductors with high Curie temperature and their quantum heterostructures Invited

    Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Shobhit Goel, Karumuri Sriharsha, Kosuke Takiguchi, Pham Nam Hai

    EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)  2023.8 

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    Event date： 2023.8

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Room-temperature spintronics using ferromagnetic semiconductor and topological insulator Invited International conference

    Pham Nam Hai

    EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)  2023.8 

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  • Annealing temperature effects on spin orbit torque in YPtBi topological semimetal and Co/Pt perpendicular magnetization multilayers

    Sho Kagami, Takanori Shirokura, Pham Nam Hai

    SSDM 2023  2023.8 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Ferromagnetic Semiconductor (Ga,Fe)Sb with Very High Curie Temperature (530 K) Grown on Vicinal GaAs(001) Substrates

    Kenta Takabayashi, Masaaki Tanaka, Pham Nam Hai

    SSDM 2023  2023.8 

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    Language：English   Presentation type：Oral presentation (general)  

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  • (Invited) High Thermal Reliability and High Spin Hall Angle Observed in SOT-Reader Thin Films Using BiSbX Topological Insulators Invited

    B.R. York, Q. Le, X. Liu, S. Okamura, C. Hwang, M.A. Gribelyuk, S. Le, J. Liu, R. Simmons, M. Maeda, F. Tuo, Y. Tao, J. Ohno, H. Takano, P.N. Hai, H. H. Huy, S. Namba

    TMRC 2023  2023.7 

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    Event date： 2023.7

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Fabrication and evaluation of fully sputtered topological insulator/perpendicularly magnetized CoFeB/MgO multilayers for SOT-MRAM application

    Zhang Ruixian, Takanori Shirokura, Tuo Fan, Pham Nam Hai

    Intermag 2023  2023.5 

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  • Generalized angle resolved second harmonic method for precise evaluation of spin orbit torque in strong perpendicular magnetic anisotropy system

    Takanori Shirokura, Pham Nam Hai

    Intermag 2023  2023.5 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Integration of BiSb topological insulator and CoFeB/MgO with perpendicular magnetic anisotropy using an oxide interfacial layer for ultralow power spin-orbit torque magnetic memory

    Ho Hoang Huy, Zhang Ruixian, Takanori Shirokura, Shigeki Takahashi, Yoshiyuki Hirayama, Pham Nam Hai

    Intermag 2023  2023.5 

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  • Ferromagnetism modulation by ultralow current in a two-dimensional polycrystalline molybdenum disulfide atomic layered structure

    Iriya Muneta, Takanori Shirokura, Pham Nam Hai, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    Intermag 2023  2023.5 

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  • (Invited)ハーフホイスラー型トポロジカル半金属を用いた配線工程耐性を有する超高効率純スピン流源の開発 Invited

    白倉 孝典, 脱 凡, グエン フン ユイ カン, ファム ナム ハイ

    第70回応用物理学会春季学術講演会  2023.3 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • (Invited) スピンホール効果を用いた読み取り磁気ヘッド素子の基礎と応用 Invited

    PHAM NAM HAI

    物質・材料研究機構、磁性・スピントロニクス材料研究拠点  2022.11 

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    Event date： 2022.11

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：筑波  

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  • Ultralow power nanosecond spin orbit torque magnetization switching induced by BiSb International conference

    Nguyen Huynh Duy Khang, Takanori Shirokura, Fan Tuo, Mao Takahashi, Naoki Nakatani, Daisuke Kato, Yasuyoshi Miyamoto, Pham Nam Hai

    MMM 2022  2022.10 

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    Event date： 2022.10 - 2022.11

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Minneapolis  

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  • Magneto-optical observation of magnetic domain formation and drive in magnetic nanowire memory with topological insulator BiSb International conference

    Mao Takahashi, Naoki Nakatani, Daisuke Kato, Kei Ogura, Yoshinori Iguchi, Pham Nam Hai, Yasuyoshi Miyamoto

    MMM 2022  2022.10 

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    Event date： 2022.10 - 2022.11

    Language：English   Presentation type：Poster presentation  

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  • Giant inverse spin Hall effect in BiSb topological insulator for SOT reader

    Ho Hoang Huy, J. SASAKI, N. H. D. KHANG, Pham NAM HAI, Q. LE, B. YORK, C. Hwang, X. LIU, M. GRIBELYUK, X. XU, S. LE, M. HO, H. TAKANO

    MMM 2022  2022.10 

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  • Giant spin Hall effect in a half-Heusler alloy topological semimetal with high thermal stability International conference

    Takanori Shirokura, Fan Tuo, Nguyen Huynh Duy Khang, Pham Nam Hai

    MMM 2022  2022.10 

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    Venue：Minneapolis  

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  • Highly Efficient Spin Current Source Using BiSb Topological Insulator / NiO Bilayers International conference

    Julian Sasaki, Shigeki Takahashi, Yoshiyuki Hirayama, Pham Nam Hai

    SSDM 2022  2022.9 

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    Event date： 2022.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Chiba  

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  • (Invited) Topological insulator for ultralow power SOT devices Invited International conference

    Pham Nam Hai

    1st MRAM Material Symposiums  2022.9 

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    Event date： 2022.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hwaseong  

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  • Signatures of two-dimensional topological insulator phase in BiSb ultrathin films

    Yuki Osada, Takanori Shirokura, Nam Hai Pham

    83th JSAP Autumn meeting  2022.9 

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  • BiSbトポロジカル絶縁体/NiO/Co接合におけるNiO障壁高さの評価

    南波 章太, 高橋 茂樹, 平山 義幸, ファム ナムハイ

    第83回応用物理学会秋季学術講演会  2022.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Effect of Bi doping on the magnetic properties of (In,Fe)Sb ferromagnetic semiconductor

    Yota Endo, Masaaki Tanaka, Pham Nam Hai

    83th JSAP Autumn meeting  2022.9 

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  • Fabrication and evaluation of BiSb topological insulator / perpendicular magnetization CoFeB multilayer film for SOT-MRAM application

    Ruixian Zhang, Shirokura Takanori, Tuo Fan, Pham Nam Hai

    83th JSAP Autumn meeting  2022.9 

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  • Giant inverse spin Hall effect in BiSb topological insulator-based SOT reader

    Ho Hoang Huy, J. SASAKI, N. H. D. KHANG, Pham NAM HAI, Q. LE, B. YORK, X. LIU, M. GRIBELYUK, X. XU, S. LE, M. HO, H. TAKANO

    83th JSAP Autumn meeting  2022.9 

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  • 強磁性を示す二次元多結晶層状物質MoS2における非対称線形磁気抵抗

    宗田 伊理也, 白倉 孝典, ファム ナムハイ, 角嶋 邦之, 筒井 一生, 若林 整

    第83回応用物理学会秋季学術講演会  2022.9 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • (Invited) Topological insulator with giant spin Hall-related phenomena for spintronic applications Invited

    Pham Nam Hai

    The 12th Vietnam-Japan Scientific Exchange Meeting (VJSE 2022)  2022.9 

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    Event date： 2022.9

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Topological Materials with Giant Spin Hall Effect and Their Applications to Magnetic Memories Invited International conference

    Pham Nam Hai

    Emerging Memory and Computer Seminar Series  2022.9 

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    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Singapore  

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  • Ferromagnetism and current control of magnetoresistance in two-dimensional polycrystalline MoS2

    Iriya Muneta, Takanori Shirokura, Pham Nam Hai, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    2022.8 

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    Event date： 2022.8 - 2022.9

    Language：Japanese   Presentation type：Poster presentation  

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  • High Spin Hall Angle doped Topological Insulators BiSbX using novel high resistive growth and migration barrier layers

    B. York, P. Hai, Q. Le, C. Hwang, S. Okamura, M. Gribelyuk, X. Xu, K. Nguyen, H. Ho, J. Sasaki, X. Liu, S. Le, M. Ho, H. Takano

    The 33rd Magnetic Recording Conference (TMRC)  2022.8 

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    Language：English  

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  • Field-free detection of in-plane magnetization switching induced by spin-orbit torque in topological insulator / ferromagnet heterostructure

    Nguyen Huynh Duy Khang, Pham Nam Hai

    The 15th Asia Pacific Physics Conference (APPC15)  2022.8 

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    Language：English   Presentation type：Oral presentation (general)  

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  • (Invited) Giant spin dependent transport phenomena in topological insulator – ferromagnet multilayers Invited

    Pham Nam Hai, Nguyen Huynh Duy Khang, Tuo Fan, Takanori Shirokura, Yasuyoshi Miyamoto

    The 15th Asia Pacific Physics Conference (APPC15)  2022.8 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Topological materials for ultralow power spintronic devices Invited International conference

    Pham Nam Hai

    Symposium on Topotronics for the Metaverse  2022.8 

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    Event date： 2022.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Tokyo  

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  • 二次元多結晶二硫化モリブデン原子層状膜における超低電流強磁性変調

    宗田 伊理也, 白倉 孝典, ファム ナム ハイ, 角嶋 邦之, 筒井 一生, 若林 整

    2022年第69回応用物理学会春季学術講演会  2022.3 

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    Event date： 2022.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • BiSb/NiO/Co接合におけるスピンホール角のNiO膜厚依存性

    TRAN NGOCVINH, 高橋 茂樹, 平山 義幸, ファム ナム ハイ

    2022年第69回応用物理学会春季学術講演会  2022.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Angle resolved second harmonic technique for precise evaluation of spin orbit torque in strong perpendicular magnetic anisotropy systems

    Takanori Shirokura, Pham Nam Hai

    2022 JSAP Spring meeting  2022.3 

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    Event date： 2022.3

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  • Nanosecond ultralow power spin orbit torque magnetization switching induced by BiSb topological insulator

    Nguyen Huynh Duy Khang, Takanori Shirokura, Tuo Fan, Mao Takahashi, Naoki Nakatani, Daisuke Kato, Yasuyoshi Miyamoto, Pham Nam Hai

    2022 JSAP Spring meeting  2022.3 

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  • L10-MnGa垂直直膜における電子状態観測

    小林 正起, N. H. D. Khang, 武田 崇仁, 荒木 恒星, 岡野 諒, 鈴木 雅弘, 黒田 健太, 矢治 光一郎, 菅原 克明, 相馬 清吾, 中山 耕輔, 山内 邦彦, 北村 未歩, 堀場 弘司, 藤森 淳, 佐藤 宇史, 辛 埴, 田中 雅明, P. N. Hai

    日本物理学会(第77回)年次大会  2022.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • L10-MnGa 垂直直膜における電子状態観測

    小林 正起, N. H. D. Khang, 武田 崇仁, 荒木 恒星, 岡野 諒, 鈴木 雅弘, 黒田 健太, 矢治 光一郎, 菅原 克明, 相馬 清吾, 中山 耕輔, 山内 邦彦, 北村 未歩, 堀場 弘司, 藤森 淳, 佐藤 宇史, 辛 埴, 田中 雅明, P. N. Hai

    強的秩序とその操作に関わる第14回研究会  2022.1 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 角度分解二次高調波法による正確なスピン軌道トルクの定量評価

    白倉 孝典, ファム ナム ハイ

    PASPS-26  2021.12 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Minority-spin impurity band in n-type (In,Fe)As: A materials perspective for ferromagnetic semiconductors International conference

    Masaki Kobayashi, Le Duc Anh, Jan Minár, Walayat Khan, Stephan Borek, Pham Nam Hai, Yoshihisa Harada, Thorsten Schmitt, Masaharu Oshima, Atsushi Fujimori, Masaaki Tanaka, Vladimir N. Strocov

    EP2DS-24/MSS-20 Joint Conference  2021.11 

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    Event date： 2021.10 - 2021.11

    Language：English   Presentation type：Oral presentation (general)  

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  • Room-temperature spin injection and spin-to-charge conversion in a ferromagnetic semiconductor / topological insulator heterostructure

    Shobhit Goel, Nguyen Huynh Duy Khang, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    EP2DS-24/MSS-20 Joint Conference  2021.11 

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    Language：English  

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  • Two-dimensional Electronic State in a Ferromagnetic L10 MnGa Thin Film with Perpendicular Magnetization

    MASAKI KOBAYASHI, N. H. D. Khang, Takahito Takeda, Kohsei Araki, Ryo Okano, Masahiro Suzuki, Kenta Kuroda, Koichiro Yaji, Katsuaki Sugawara, Seigo Souma, Kosuke Nakayama, Miho Kitamura, Koji Horiba, Atsushi Fujimori, Takafumi Sato, Shik Shin, Masaaki Tanaka, Pham Nam Hai

    82th JSAP Autumn meeting  2021.9 

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    Event date： 2021.9

    Language：English   Presentation type：Oral presentation (general)  

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  • Room-temperature spin injection and spin-to-charge conversion in a ferromagnetic semiconductor/topological insulator heterostructure

    Shobhit Goel, Nguyen Huynh Duy Khang, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    2021 International Conference on Solid State Devices and Materials (SSDM 2021)  2021.9 

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    Language：English  

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  • Room-temperature spin injection and spin-to-charge conversion in a ferromagnetic semiconductor / topological insulator heterostructure

    Shobhit Goel, Nguyen Huynh Duy Khang, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    International conference on Molecular Beam Epitaxy (21th ICMBE)  2021.9 

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    Language：English  

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  • High spin Hall angle in sputtered BiSb topological insulator (bottom)/ ferromagnet with in-plane magnetization on sapphire substrates International conference

    J. Sasaki, Ho Hoang Huy, Nguyen H.D. Khang, P. N. Hai, Q. Le, B. York, X. Liu, S. Le, C. Hwang, M. Ho, H. Takano

    The 32nd Magnetic Recording Conference (TMRC 2021)  2021.8 

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    Language：English   Presentation type：Oral presentation (general)  

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  • The Practical Material Challenges Involved in using the Topological Insulator BiSb in a Spin Transfer Device International conference

    B. York, P. N. Hai, Q. Le, C. Hwang, Nguyen H.D. Khang, Ho Hoang Huy, J. Sasaki, X. Liu, S. Le, M. Ho, H. Takano

    The 32nd Magnetic Recording Conference (TMRC 2021)  2021.8 

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    Event date： 2021.8

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  • Non-conventional spin Hall effect in YPt alloy

    Takanori Shirokura, Kou Fujiwara, Pham Nam Hai

    Intermag 2021  2021.4 

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    Event date： 2021.4

    Language：English  

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  • Evaluation of Spin Hall effect in YPt alloy

    Kou Fujiwara, Takanori Shirokura, Pham Nam Hai

    The 68th JSAP Spring meeting  2021.3 

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    Event date： 2021.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Investigation of Tunneling Barriers for Si Spin-Valve Devices

    Jialiang YU, Dinh Hiep DUONG, Nam Hai PHAM

    The 68th JSAP Spring meeting  2021.3 

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    Event date： 2021.3

    Language：English   Presentation type：Poster presentation  

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  • New method for field-free detection of in-plane magnetization switching induced by spin-orbit torque

    Nguyen Huynh Duy Khang, Pham Nam Hai

    The 68th JSAP Spring meeting  2021.3 

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    Event date： 2021.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Evaluation of Spin Hall effect in YPt alloy

    Fujiwara Kou, Shirokura Takanori, Nam Hai Pham

    JSAP Annual Meetings Extended Abstracts  2021.2  The Japan Society of Applied Physics

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    Event date： 2021.2

    Language：Japanese  

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  • Sb concentration dependence of spin Hall effect in BiSb topological insulator

    市村雅貴, NGUYEN Huynh Duy Khang, 高橋真央, 宮本泰敬, PHAM Nam Hai

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)  2021 

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    Event date： 2021

    Language：Japanese  

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  • 強磁性量子ヘテロ構造による物性機能の創出と不揮発・低消費電力スピンデバイスへの応用

    田中雅明, Pham Nam Hai, 中根了昌, 大矢忍, 吉田博

    CREST研究領域第5回領域会議「量子状態の高度な制御に基づく革新的量子技術基盤の創成」  2020.12 

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    Event date： 2020.12

    Language：Japanese  

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  • Topological insulator as novel spin current source for spin-orbit-torque magnetoresistive random access memory International conference

    Pham Nam Hai

    9th imec Handai International Symposium  2020.11 

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    Event date： 2020.11

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Topological Insulator Spintronics Invited International conference

    Pham Nam Hai, Nguyen Huynh Duy Khang, Tuo Fan, Yugo Ueda, Yasuyoshi Miyamoto

    The VANJ Conference 2020 (VANJ20)  2020.11 

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    Event date： 2020.11

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Keynote) New ferromagnetic semiconductors and spintronics applications Invited

    Masaaki Tanaka, Le Duc Anh, Kosuke Takiguchi, Shobhit Goel, Shinobu Ohya, Nguyen Thanh Tu, Pham Nam Hai

    The VANJ Conference 2020 (VANJ20)  2020.11 

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    Event date： 2020.11

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • トポロジカル表面状態を用いるスピン軌道トルク磁気メモリの創製

    ファム ナムハイ, 宮本 泰敬, 小林 正起

    CREST領域会議 「トポロジカル材料科学の構築による革新的材料・デバイスの創出」  2020.11 

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    Event date： 2020.11

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Ultrahigh efficient spin-orbit-torque magnetization switching in sputtered topological insulator BiSb/(Co/Pt)2 multilayers

    Tuo Fan, Nguyen Huynh Duy Khang, Soichiro Nakano, Pham Nam Hai

    2020 Magnetism and Magnetic Materials  2020.11 

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    Event date： 2020.11

    Language：English  

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  • Crystal Growth and Characterization of Topological Insulator BiSb Thin Films by Sputtering Deposition for SOT-MRAM Applications

    Tuo Fan, Mustafa Tobah, Takanori Shirokura, Nguyen Huynh Duy Khang, Pham Nam Hai

    SSDM 2020  2020.9 

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    Event date： 2020.9

    Language：English   Presentation type：Oral presentation (general)  

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  • Efficient spin-orbit torque magnetization switching by short pulse currents in non-epitaxial topological insulator BiSb – ferrimagnet heterostructures

    Nguyen Huynh Duy Khang, Soichiro Nakano, Takanori Shirokura, Yasuyoshi Miyamoto, Pham Nam Hai

    The 81th JSAP Autumn meeting  2020.9 

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    Event date： 2020.9

    Language：English   Presentation type：Oral presentation (general)  

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  • (Invited) New ferromagnetic semiconductors and spintronics applications: Fe-doped narrow-gap III-V ferromagnetic semiconductors and heterostructures with high Curie temperature Invited

    M. Tanaka, L. D. Anh, K. Takiguchi, S. Goel, S. Ohya, N. T. Tu, P. N. Hai

    39th Electronic Materials Symposium EMS-39  2020.9 

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    Event date： 2020.10

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Giant spin-related transport phenomena in BiSb topological insulator/ferromagnet bilayers Invited

    Nguyen Huynh Duy Khang, Tuo Fan, Pham Nam Hai

    SPIE Spintronics XIII  2020.8 

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    Event date： 2020.8

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Ultralow-power and fast spin-orbit torque magnetization switching in all – sputtered BiSb topological insulator – ferrimagnet multilayers

    Nguyen Huynh Duy Khang, Soichiro Nakano, Takanori Shirokura, Yasuyoshi Miyamoto, Pham Nam Hai

    Spin-RNJ 若手オンライン研究発表会  2020.6 

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    Event date： 2020.6

    Language：English   Presentation type：Oral presentation (general)  

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  • Giant Unidirectional Spin Hall Magnetoresistance in GaMnAs/BiSb Bilayers International conference

    Nguyen Huynh Duy Khang, Pham Nam Hai

    Intermag 2020  2020.5 

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    Event date： 2020.5

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Montreal  

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  • Improved thermal stability of BiSb pure spin current source for embedded MRAM

    NAKANO SOICHIRO, Kenichiro Yao, NamHai Pham

    JSAP Annual Meetings Extended Abstracts  2020.2  The Japan Society of Applied Physics

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    Event date： 2020.2

    Language：English  

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  • Improvement of output in anomalous Hall effect sensors using (In,Fe)Sb

    Takahashi Shunsuke, Ekaputra Yohar Kevin, Tanaka Masaaki, Pham Nam Hai

    JSAP Annual Meetings Extended Abstracts  2020.2  The Japan Society of Applied Physics

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    Event date： 2020.2

    Language：English  

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  • (Invited) Fe-doped narrow-gap III-V ferromagnetic semiconductors and related heterostructures with high Curie temperature Invited

    Masaaki Tanaka, Le Duc Anh, Kosuke Takiguchi, Shobhit Goel, Shinobu Ohya, Nguyen Thanh Tu, Pham Nam Hai

    The 2nd Kavli ITS Workshop on Magnetic Semiconductors  2020.1 

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    Event date： 2020.1

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Giant spin Hall effect in BiSb topological insulator Invited

    Pham Nam Hai, Nguyen Huynh Duy Khang, Yasuyoshi Miyamoto

    The 2nd Kavli ITS Workshop on Magnetic Semiconductors  2020.1 

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  • Fabrication of Integrated Writer & Reduction of Writer Current in Magnetic Nanowire Memory

    宮本泰敬, 宮本泰敬, 堀洋祐, 遠藤充泰, PHAM Nam Hai, PHAM Nam Hai, 石井紀彦

    電子情報通信学会大会講演論文集(CD-ROM)  2020 

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    Event date： 2020

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  • Improved thermal stability of BiSb topological insulator for embedded MRAM

    Soichiro Nakano, Kenichiro Yao, Pham Nam Hai

    PASPS-24  2019.12 

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    Event date： 2019.12

    Language：English   Presentation type：Oral presentation (general)  

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  • (Invited) Giant spin Hall effect in topological insulalor Invited

    Pham Nam Hai, Nguyen Huynh Duy Khang

    The 11th International Conference on Advanced Materials and Devices (ICAMD 2019)  2019.12 

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    Event date： 2019.12

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) New Fe-doped III-V ferromagnetic semiconductors and their heterostructures Invited

    Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai

    The 11th International Conference on Advanced Materials and Devices (ICAMD 2019)  2019.12 

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    Event date： 2019.12

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) High-Curie-temperature n-type and p-type Fe-doped III-V ferromagnetic semiconductors and heterostructures – Giant proximity magnetoresistance and control by gate voltage Invited

    Kosuke Takiguchi, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    The 3rd CSRN-Tokyo Workshop 2019  2019.11 

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    Event date： 2019.11

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Giant spin related phenomena in BiSb topological insulator/ferromagnet heterostructures Invited

    Nguyen Huynh Duy Khang, Yugo Ueda, Kenichiro Yao, Yasuyoshi Miyamoto, Pham Nam Hai

    The 3rd CSRN-Tokyo Workshop 2019  2019.11 

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    Event date： 2019.11

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) New n-type and p-type Fe-doped III-V ferromagnetic semiconductors with high TC Invited

    Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai

    14th Asia-Pacific Physics Conference (APPC14)  2019.11 

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    Event date： 2019.11

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Giant spin-orbit torque generated by BiSb topological insulator Invited

    Pham Nam Hai, Nguyen Huynh Duy Khang, Takanori Shirokura, Kenichiro Yao

    2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Proposal of an eXtremely simple MRAM (X-MRAM) using magnon emission/absorption and spin-disorder scattering for readout

    Pham Nam Hai, Nguyen Huynh Duy Khang Nguyen, Takanori Shirokura

    The 80th JSAP Autumn meeting  2019.9 

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    Event date： 2019.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • (Invited) ｎ型およびｐ型Fe系強磁性半導体 ー 高いキュリー温度の実現とヘテロ構造デバイスへの展開 Invited

    Le Duc Anh, Nguyen Thanh Tu, 瀧口 耕介, ファム ナム ハイ, 田中 雅明

    第80回応用物理学会秋季学術講演会  2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • (Invited) BiSbトポロジカル絶縁体を用いる超高性能純スピン流源 Invited

    ファム ナム ハイ, ゲィン フンユィカン, 白倉 孝典, 八尾 健一郎

    第80回応用物理学会秋季学術講演会  2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Room-temperature spin-orbit torque magnetization switching induced by non-epitaxial BiSb topological insulator

    Nguyen Huynh Duy Khang, Yasuyoshi Miyamoto, Pham Nam Hai

    The 80th JSAP Autumn meeting  2019.9 

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    Event date： 2019.9

    Language：English   Presentation type：Poster presentation  

    Venue：北海道  

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  • Crystal Growth and Evaluation of BiSb Topological Insulator by Sputter Deposition

    Tuo Fan, Mustafa Tobah, Takanori Shirokura, Nguyen Huynh Duy Khang, Pham Nam Hai

    The 80th JSAP Autumn meeting  2019.9 

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    Event date： 2019.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • (招待講演）トポロジカル絶縁体・磁性体接合におけるスピンホール関連現象 Invited

    PHAM NAM HAI

    強的秩序とその操作に関わる研究グループ 第9回 研究会 ー夏の学校ー  2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：北海道  

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  • N-type and p-type ferromagnetic semiconductors: High Curie temperature and heterostructure devices

    Anh Le Duc, Nguyen Thanh Tu, Takiguchi Kosuke, Nam Hai Pham, Tanaka Masaaki

    JSAP Annual Meetings Extended Abstracts  2019.9  The Japan Society of Applied Physics

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    Event date： 2019.9

    Language：Japanese  

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  • Ultrahigh performance pure spin current source using BiSb topological insulator

    Hai PHAM Nam, Khang Nguyen Huynh Duy, Shirokura Takanori, Yao Kenichiro

    JSAP Annual Meetings Extended Abstracts  2019.9  The Japan Society of Applied Physics

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    Event date： 2019.9

    Language：Japanese  

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  • (Invited) Giant Spin-orbit torque Generated by BiSb Topological Insulator for MRAM Applications Invited International conference

    Pham Nam Hai, Nguyen Huynh Duy Khang, Takanori Shirokura, Kenichiro Yao

    11th International Conference on Magnetic and Superconducting Materials  2019.8 

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    Event date： 2019.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Seoul  

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  • (Invited) Origin of the giant spin-orbit-torque generated by BiSb topological insulator Invited International conference

    Pham Nam Hai, Takanori Shirokura, Kenichiro Yao

    SPIE Spintronics XII  2019.8 

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    Event date： 2019.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego  

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  • (Invited) Fe-doped III-V ferromagnetic semiconductors and heterostructures Invited International conference

    Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai

    SPIE Spintronics XII  2019.8 

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    Event date： 2019.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego  

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  • (Invited) Giant spin-orbit torque generated by BiSb topological insulator for high-performance spintronic devices Invited International conference

    Pham Nam Hai, Nguyen Huynh Duy Khang, Takanori Shirokura, Kenichiro Yao, Yugo Ueda

    International Workshop on New Trends in Topological Insulators 2019 & Variety and Universality of Bulk-edge Correspondence in Topological Phases (NTTI2019 and BEC 2019)  2019.7 

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    Event date： 2019.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hiroshima  

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  • Unveiling the electronic band structure of n-type ferromagnetic semiconductor (In,Fe)As

    Masaki Kobayashi, Le Duc Anh, Jan Minár, Walayat Khan, Pham Nam Hai, Yoshihisa Harada, Thorsten Schmitt, Atsushi Fujimori, Masaharu Oshima, Masaaki Tanaka, Vladimir N. Strocov

    40th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX19)  2019.7 

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    Event date： 2019.7

    Language：English   Presentation type：Oral presentation (general)  

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  • Observation of topological Hall effect and field-free stable skyrmions in MnGa/BiSb bi-layers at room temperature International conference

    Nguyen Huynh Duy Khang, Tuo Fan, Pham Nam Hai

    Spintech X  2019.6 

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    Event date： 2019.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Chicago  

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  • Heavily Fe-doped n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature and large magnetic anisotropy International conference

    Nguyen Tu Thanh, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    Compound Semiconductor Week 2019 (CSW2019)  2019.5 

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    Event date： 2019.5

    Language：English   Presentation type：Poster presentation  

    Venue：Nara  

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  • Spin dependent transport properties of spin bipolar transistors using a (Ga,Fe)Sb/(In,Fe)As p-n junction International conference

    Koki Chonan, Yuto Arakawa, Masaaki Tanaka, Pham Nam Hai

    Compound Semiconductor Week 2019 (CSW2019)  2019.5 

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    Event date： 2019.5

    Language：English   Presentation type：Poster presentation  

    Venue：Nara  

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  • (Invited) FE-BASED NARROW-GAP FERROMAGNETIC SEMICONDUCTORS: NEW APPROACH TO SPIN-BASED ELECTRONICS Invited International conference

    Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    Vietnam-Japan Science and Technology Symposium 2019 (VJST2019)  2019.5 

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    Event date： 2019.5

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hanoi  

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  • (Key Note) SPIN HALL EFFECT IN TOPOLOGICAL INSULATORS: FROM FUNDAMENTAL RESEARCHES TO SPINTRONIC DEVICE APPLICATIONS Invited International conference

    Pham Nam Hai, Nguyen Huynh Duy Khang, Takanori Shirokura, Kenichiro Yao, Yugo Ueda

    Vietnam-Japan Science and Technology Symposium 2019 (VJST2019)  2019.5 

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    Event date： 2019.5

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hanoi  

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  • Large Unidirectional Magnetoresistance in GaMnAs/BiSb bilayers

    Nguyen Huynh Duy Khang, Pham Nam Hai

    The 66th JSAP Spring meeting  2019.3 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Heavily Fe-doped n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature and large magnetic anisotropy

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    The 66th JSAP Spring meeting  2019.3 

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  • Large spin-valve effect in a lateral spin-valve device with MnGa electrodes

    Koki Chonan, Nguyen Huynh Duy Khang, Masaaki Tanaka, Pham Nam Hai

    The 66th JSAP Spring meeting  2019.3 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Large spin-dependent magnetoresistance and output voltage in the nanoscale Si spin-valve devices

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    The 66th JSAP Spring meeting  2019.3 

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    Event date： 2019.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Fabrication and evaluation of lateral spin-valve devices using MnAs spin injector

    Keita Yamane, Kenichiro Yao, Masaaki Tanaka, Pham Nam Hai

    The 66th JSAP Spring meeting  2019.3 

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  • Fabrication and evaluation of lateral spin-valve devices using MnAs spin injector

    Yamane Keita, Yao Kenichiro, Tanaka Masaaki, Nam Hai Pham

    JSAP Annual Meetings Extended Abstracts  2019.2  The Japan Society of Applied Physics

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    Event date： 2019.2

    Language：English  

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  • Large spin-valve effect in a lateral spin-valve device with MnGa electrodes

    Chonan Koki, Duy Khang Nguyen Huynh, Tanaka Masaaki, Nam Hai Pham

    JSAP Annual Meetings Extended Abstracts  2019.2  The Japan Society of Applied Physics

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    Language：English  

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  • Fe δドーピングによる(In,Fe)Sb 高感度磁気センサーの作製と評価

    西嶋 健人, 田中 雅明, Pham Nam Hai

    「スピントロニクス学術研究基盤と連携ネットワーク」シンポジウム  2019.2 

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    Event date： 2019.2

    Language：Japanese   Presentation type：Poster presentation  

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  • (Invited) Topological insulator for ultralow power SOT-MRAM Invited International conference

    Pham Nam Hai

    International School on Spintronics and Korea-Japan Spintronics Workshop - Topological Phenomena in Magnetism -  2019.1 

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    Event date： 2019.1

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Nagoya  

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  • (Invited) High Curie temperature and Electrical Control of Magnetic Properties in Fe-based Narrow-gap III-V Ferromagnetic Semiconductor Heterostructures Invited International conference

    Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    2019 Joint MMM-Intermag conference  2019.1 

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    Event date： 2019.1

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Washington DC  

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  • (Invited) Giant spin Hall effect in BiSb topological insulator Invited International conference

    Pham Nam Hai

    The 50th Reimei workshop: Universal Physics in Many-Body Quantum Systems — From Atoms to Quarks –  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Tokai, Ibaraki  

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  • Room-temperature anomalous Hall effect of Fe delta-doped (In,Fe)Sb ferromagnetic semiconductor thin films

    K. Nishijima, S. Takahashi, M. Tanaka, P. N. Hai

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Oral presentation (general)  

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  • Unveiling Origin of Ferromagnetism in Fe-Doped Ferromagnetic Semiconductor by Synchrotron Radiation Spectroscopy

    M. Kobayashi, L. D. Anh, P. N. Hai, H. Kiuchi, H. Niwa, J. Miyawaki, Y. Harada, T. Schmitt, A. Fujimori, V. N. Strocov, M. Oshima, M. Tanaka

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Oral presentation (general)  

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  • 鉄系強磁性半導体を用いたスピンバイポーラトランジスタの作製と評価

    長南 光貴, 荒川 雄斗, 田中 雅明, ファム ナム ハイ

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：Japanese   Presentation type：Poster presentation  

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  • (Invited) High-temperature ferromagnetism in both p-type and n-type Fe-doped III-V ferromagnetic semiconductors Invited

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Origin of the giant spin Hall effect in BiSb topological insulator

    K. Yao, T. Shirokura, P. N. Hai

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Poster presentation  

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  • (Invited) Topological insulator for ultra-low power magnetic memories Invited

    Pham Nam Hai, Khang Huynh Duy Nguyen, Kenichiro Yao, Takanori Shirokura

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Field-free ground-state skyrmions in BiSb/MnGa bi-layers at room temperature revealed by topological Hall effect

    Nguyen Huynh Duy Khang, Tuo Fan, Pham Nam Hai

    第23回 半導体におけるスピン工学の基礎と応用（PASPS-23)  2018.12 

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    Event date： 2018.12

    Language：English   Presentation type：Oral presentation (general)  

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  • (Invited) 超高性能純スピン注入源としての BiSb トポロジカル絶縁体 Invited

    Pham Nam Hai, Nguyen Huynh Duy Khang, 八尾 健一郎, 白倉 孝典

    ISSPワークショップ「スピン軌道強結合伝導系におけるサイエンスの新展開」  2018.11 

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    Event date： 2018.11

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • (Invited) Spin-dependent transport phenomena in Fe-doped ferromagnetic semiconductor-based spin devices Invited International conference

    Pham Nam Hai, Kento Nishijima, Tomohiro Otsuka, Nguyen Thanh Tu, Le Duc Anh, Masaaki Tanaka

    The Kavli ITS Workshop on Diluted Magnetic Semiconductors: Challenges and Opportunities  2018.11 

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    Event date： 2018.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Beijing  

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  • (Invited) New n-type and p-type Fe-doped III-V ferromagnetic semiconductors with high TC Invited International conference

    Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai

    The Kavli ITS Workshop on Diluted Magnetic Semiconductors: Challenges and Opportunities  2018.11 

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    Event date： 2018.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Beijing  

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  • (Invited) Colossal spin Hall effect in a conductive topological insulator Bi0.9Sb0.1 for ultra-low-power spin-orbit-torque switching Invited International conference

    Nguyen Huynh Duy Khang, Yugo Ueda, Pham Nam Hai

    The 11th Vietnam-Japan Scientific Exchange Meeting  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Fabrication and evaluation of Fe delta-doped (In,Fe)Sb high sensitivity magnetic sensors

    Kento Nishijima, Masaaki Tanaka, Nam Hai Pham

    The 79th JSAP Autumn Meeting  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

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  • Crystal Growth of BiSb topological insulator on GaAs(001), (111)A and (111)B substrates

    Kenichiro Yao, Duy Khang Nguyen Huynh, Masataka Ichimura, Nam Hai Pham

    The 79th JSAP Autumn Meeting  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

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  • Spin dependent transport characteristics of spin bipolar transistors based on Fe doped ferromagnetic semiconductors

    Koki Chonan, Yuto Arakawa, Masaaki Tanaka, Pham Nam Hai

    The 79th JSAP Autumn Meeting  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

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  • Room-temperature field-free formation of stable skyrmions in BiSb/MnGa bi-layers

    Nguyen Huynh Duy Khang, Fan Tuo, Hai Pham Nam

    The 79th JSAP Autumn Meeting  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

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  • N-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature: Electrical control of ferromagnetism International conference

    N. T. Tu, P. N. Hai, L. D. Anh, M. Tanaka

    SSDM 2018  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Influence of crystalorientation and surface terminationon the growth of BiSb topological insulator thin films on GaAs substrates International conference

    Kenichiro Yao, Nguyen Huynh Duy Khang, Pham Nam Hai

    20th International Conference on Molecular Beam Epitaxy (ICMBE 2018)  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Shanghai  

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  • Voltage-Controlled Magneto-conductance in N-type Ferromagnetic Semiconductor (In,Fe)As-based Spin Esaki Diodes International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    20th International Conference on Molecular Beam Epitaxy (ICMBE 2018)  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Shanghai  

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  • Fe delta-doped (In,Fe)Sb ferromagnetic semiconductor thin films formagnetic-field sensors with ultrahigh sensitivity International conference

    Kento Nishijima, Masaaki Tanaka, Pham Nam Hai

    20th International Conference on Molecular Beam Epitaxy (ICMBE 2018)  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Shanghai  

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  • (Invited) New n-type and p-type ferromagnetic semiconductors with high TC Invited International conference

    Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai

    20th International Conference on Molecular Beam Epitaxy (ICMBE 2018)  2018.9 

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    Event date： 2018.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Shanghai  

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  • Conductive BiSb topological insulator with colossal spin Hall effect for ultra-low power spin-orbit-torque switching

    Kenichiro Yao, Pham Nam Hai, Nguyen Huynh Duy Khang, Yugo Ueda

    Spintronics XI  2018.9  SPIE

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    Event date： 2018.9

    Language：English  

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  • Fe-based n-type and p-type narrow-gap III-V ferromagnetic semiconductors with high Curie temperatures (Conference Presentation)

    Duc Anh Le, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    Spintronics XI  2018.9  SPIE

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    Event date： 2018.9

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  • (Invited) Conductive BiSb topological insulator with colossal spin Hall effect for ultra-low power spin-orbit-torque switching Invited International conference

    Pham Nam Hai, Nguyen Huynh Duy Khang, Kenichiro Yao, Yugo Ueda

    SPIE Spintronics XI  2018.8 

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    Event date： 2018.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego  

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  • (Invited) Fe-based n-type and p-type narrow-gap III-V ferromagnetic semiconductors with high Curie temperatures Invited International conference

    Duc Anh Le, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    SPIE Spintronics XI  2018.8 

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    Event date： 2018.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego  

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  • Electrical control of ferromagnetism in the new n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature International conference

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    10th International School and Conference on Physics and Applications of Spin Phenomena in Solids (PASPS 10)  2018.8 

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    Event date： 2018.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Linz  

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  • Electrical control of ferromagnetism in the new n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature International conference

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    JSPS Core-to-Core Japan Workshop 2018 on Nanoscale Electron-photon Interactions via Energy Dissipation and Fluctuation  2018.7 

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    Event date： 2018.7

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • Ultra-low-power spin-orbit-torque switching using the colossal spin Hal effect in BiSb topological insulator International conference

    Khang Nguyen, Yugo Ueda, Nam Hai Pham

    Intermag2018  2018.4 

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    Event date： 2018.4

    Language：English   Presentation type：Oral presentation (general)  

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  • Role of surface states in the generation of the colossal spin Hal effect in BiSb topological insulator International conference

    Kenichiro Yao, Takanori Shirokura, Nam Hai Pham

    Intermag2018  2018.4 

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    Event date： 2018.4

    Language：English   Presentation type：Oral presentation (general)  

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  • Large spin-valve effect in Si nano spin-valve devices International conference

    Hiep Duong, Masaaki Tanaka, Nam Hai Pham

    Intermag2018  2018.4 

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    Event date： 2018.4

    Language：English   Presentation type：Oral presentation (general)  

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  • Effect of Be Doping on the Electronic Structure of n-Type Ferromagnetic Semiconductor (In,Fe)As

    MASAKI KOBAYASHI, HISAO KIUCHI, HIDEHARU NIWA, JUN MIYAWAKI, ATSUSHI FUJIMORI, LE DUC ANH, PHAM NAM HAI, MASAAKI TANAKA, MASAHARU OSHIMA, YOSHIHISA HARADA

    The 65th JSAP Spring meeting  2018.3 

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    Event date： 2018.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Room-temperature colossal spin Hall effect in topological insulator Bi0.9Sb0.1(012) thin films for ultra-low-power spin-orbit-torque switching

    Nguyen Huynh Duy Khang, Yugo Ueda, Hai Pham Nam

    The 65th JSAP Spring meeting  2018.3 

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    Event date： 2018.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Magneto-thermopower in Ferromagnetic Semiconductor In1-xFexSb

    CONG TINH BUI, CHRISTINA GARCIA, NGUYEN THANH TU, MASAAKI TANAKA, PHAM NAM HAI

    The 65th JSAP Spring meeting  2018.3 

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    Event date： 2018.3

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  • Temperature dependence of the colossal spin Hall effect in a BiSb(001)/MnAs bi-layer

    Takanori Shirokura, Kenichiro Yao, Pham Nam Hai

    The 65th JSAP Spring meeting  2018.3 

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    Event date： 2018.3

    Language：English   Presentation type：Oral presentation (general)  

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  • Spin-dependent thermoelectric effects in (In,Fe)Sb ferromagnetic semiconductor

    Cong Tinh Bui, Christina Garcia, Nguyen Thanh Tu, Masaaki Tanaka, Pham Nam Hai

    Spin-RNJ Symposium 2018  2018.3 

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    Event date： 2018.3

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • Fe based narrow-gap ferromagnetic semiconductors: New materials for high-performance spintronic devices

    Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    東京大学 第9回低温センター研究交流会  2018.2 

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    Event date： 2018.2

    Language：English   Presentation type：Oral presentation (general)  

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  • Realization of spontaneous spin splitting in the conduction band of n-type ferromagnetic semiconductor (In,Fe)As International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    The 4th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA)  2017.12 

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    Event date： 2017.12

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Phu Quoc  

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  • Tuning of Magnetoconductance by Electrical Control of Band Alignment in a n+-(In,Fe)As/p+-InAs Esaki Diode International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    Junjirou Kanamori Memorial International Symposium – New Horizon of Magnetism-  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • Magnetic and structural properties of MnGa thin films grown on Bi0.8Sb0.2 topological insulator International conference

    N. H. D. Khang, Y. Ueda, P. N. Hai

    Junjirou Kanamori Memorial International Symposium – New Horizon of Magnetism-  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • (Invited) Recent progress and topics in semiconductor spintronics and ferromagnetic semiconductors Invited International conference

    M. Tanaka, S. Ohya, L.D. Anh, N.T. Tu, I. Muneta, P.N. Hai

    Junjirou Kanamori Memorial International Symposium – New Horizon of Magnetism-  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Tokyo  

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  • Valence-Band Electronic Structure of n-type Ferromagnetic Semiconductor (In,Fe)As International conference

    M. Kobayashi, L. D. Anh, P. N. Hai, Y. Harada, T. Schmitt, A. Fujimori, M. Tanaka, M. Oshima, V. N. Strocov

    Junjirou Kanamori Memorial International Symposium – New Horizon of Magnetism-  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • Inverse spin-valve effect in spin-valve devices with nanoscale Si channels International conference

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    Junjirou Kanamori Memorial International Symposium – New Horizon of Magnetism-  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • n型強磁性半導体(In,Fe)Asの電子構造に対するBe添加効果

    小林 正起, 木内 久雄, 丹羽 秀治, 宮脇 淳, 藤森 淳, Le Duc Anh, Pham Nam Hai, 田中 雅明, 尾嶋正治, 原田慈久

    2017年 日本物理学会 秋季大会  2017.9 

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    Event date： 2017.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岩手  

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  • n型強磁性半導体(In,Fe)As:Beの価電子帯電子構造

    小林正起, Le Duc Anh, Pham Nam Hai, 原田慈久, Thorsten Schmitt, 藤森 淳, 田中雅明, 尾嶋正治, Vladimir N. Strocov

    2017年 日本物理学会 秋季大会  2017.9 

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    Event date： 2017.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岩手  

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  • Inverse spin-valve effect in MBE-grown nanoscale Si spin-valve devices International conference

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    2017 International Conference on Solid State Devices and Materials (SSDM2017)  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Poster presentation  

    Venue：Sendai  

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  • n型強磁性半導体(In,Fe)As:Beの価電子帯電子構造

    小林正起, Le Duc Anh, Pham Nam Hai, 原田慈久, Thorsten Schmitt, 藤森 淳, 田中雅明, 尾嶋正治, Vladimir N. Strocov

    日本放射光学会第9回若手研究会 最先端のパルス光で観る超高速科学  2017.9 

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    Event date： 2017.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Electronic Structure of the p-type Ferromagnetic Semiconductor (Ga,Fe)Sb

    MASAKI KOBAYASHI, LE DUC ANH, PHAM NAM HAI, YOSHIHISA HARADA, THORSTEN SCHMITT, ATSUSHI FUJIMORI, MASAAKI TANAKA, MASAHARU OSHIMA, VLADIMIR N. STROCOV

    第78回応用物理学会秋季学術講演会  2017.9 

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    Event date： 2017.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：福岡  

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  • (Invited) Fe-doped ferromagnetic semiconductors for high-performance semiconductor spin devices Invited International conference

    Pham Nam Hai, Tomohiro Otsuka, Munehiko Yoshida, Nguyen Thanh Tu, Le Duc Anh, Masaaki Tanaka

    The 29th International Conference on Defects in Semiconductors(ICDS-29)  2017.7 

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    Event date： 2017.7 - 2017.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Matsue  

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  • (Invited) Fe-based narrow-gap ferromagnetic semiconductor: New materials for high-performance spintronic devices Invited International conference

    Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai, Masaaki Tanaka

    2017 Collaborative Conference on Materials Research (CCMR)  2017.6 

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    Event date： 2017.6

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Jeju Island  

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  • MnGa thin films with perpendicular magnetic anisotropy grown on BiSb topological insulator

    Nguyen Huynh Duy Khang, Yugo Ueda, Pham Nam Hai

    東京工業大学2017スピントロニクイノベーショ研究推進体会～ ポストピンロニクへの挑戦～  2017.6 

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  • MnGa thin films with perpendicular magnetic anisotropy grown on BiSb topological insulator International conference

    Nguyen Huynh Duy Khang, Yugo Ueda, Pham Nam Hai

    9th International School and Conference on Spintronics and Quantum Information Technolog (Spintech IX)  2017.6 

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    Language：English   Presentation type：Poster presentation  

    Venue：Fukuoka  

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  • High-temperature ferromagnetism in n-type and p-type Fe-doped ferromagnetic semiconductors International conference

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    9th International School and Conference on Spintronics and Quantum Information Technolog (Spintech IX)  2017.6 

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    Language：English   Presentation type：Poster presentation  

    Venue：Fukuoka  

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  • Tuning of Magnetoconductance by electrical control of band alignment in n+(In,Fe)As/p+InAs Esaki diode International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    9th International School and Conference on Spintronics and Quantum Information Technolog (Spintech IX)  2017.6 

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    Language：English   Presentation type：Poster presentation  

    Venue：Fukuoka  

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  • Growth and characterization of MnGa thin films on BiSb topological insulator

    N. H. D. Khang, P. N. Hai

    第64回応用物理学会春季学術講演会  2017.3 

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    Event date： 2017.3

    Language：English   Presentation type：Poster presentation  

    Venue：神奈川県  

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  • High-temperature ferromagnetism in a new n-type Fe-doped ferromagnetic semiconductor (In,Fe)Sb

    Nguyen Tu Thanh, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    第64回応用物理学会春季学術講演会  2017.3 

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    Event date： 2017.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • Electrical properties of Bi1-xSbx spin Hall thin films grown on GaAs(111)A substrates”

    K. Yao, Y. Ueda, N. H. D. Khang, P. N. Hai

    第64回応用物理学会春季学術講演会  2017.3 

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    Event date： 2017.3

    Language：English   Presentation type：Poster presentation  

    Venue：神奈川県  

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  • Spin valve effect in Si-based spin valve devices with a nano-scale Si channel

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    第64回応用物理学会春季学術講演会  2017.3 

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    Event date： 2017.3

    Language：English   Presentation type：Poster presentation  

    Venue：神奈川県  

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  • Bias and temperature dependence of giant magnetoresistance in (In,Fe)As/(Ga,Fe)Sb spin diode

    Tomohiro Otsuka, Yuto Arakawa, Kento Nishijima, Masaaki Tanaka, Pham Nam Hai

    第64回応用物理学会春季学術講演会  2017.3 

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    Event date： 2017.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • Observation of large spin splitting in the conduction band of n-type ferromagnetic semiconductor (In,Fe)As International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    APS March Meeting 2016  2017.3 

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    Event date： 2017.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：New Orleans  

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  • Bias and temperature dependence of giant magnetoresistance in (In,Fe)As/(Ga,Fe)Sb spin diode

    Otsuka Tomohiro, Arakawa Yuto, Nishijima Kento, Tanaka Masaaki, Pham NamHai

    JSAP Annual Meetings Extended Abstracts  2017.3  The Japan Society of Applied Physics

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    Event date： 2017.3

    Language：Japanese  

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  • Electrical properties of Bi1-xSbx spin Hall thin films grown on GaAs(111)A substrates

    Yao Kenichiro, Ueda Yugo, Huynh Duy Khang Nguyen, Nam Hai Pham

    JSAP Annual Meetings Extended Abstracts  2017.3  The Japan Society of Applied Physics

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    Event date： 2017.3

    Language：Japanese  

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  • (Invited) High-performance Fe-doped ferromagnetic semiconductors Invited International conference

    Pham NamHai, Le Duc Anh, Nguyen Thanh Tu, Masaaki Tanaka

    International Workshop on Advanced Materials and Nanotechnology 2016 (IWAMN 2016)  2016.11 

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    Event date： 2016.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hanoi  

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  • (Invited) N-type carrier-induced ferromagnetic semiconductor and electrical control of ferromagnetism by wavefunction engineering Invited International conference

    Le Duc Anh, Pham NamHai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    61st Annual Conference on Magnetism and Magnetic Materials (2016 MMM)  2016.10 

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    Event date： 2016.10 - 2016.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：New Orleans  

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  • Giant spin-valve effect in (Ga,Fe)As/(In,Fe)As spin diodes

    Tomohiro Otsuka, Yuto Arakawa, Masaaki Tanaka, Pham Nam Hai

    61st Annual Conference on Magnetism and Magnetic Materials (2016 MMM)  2016.10 

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    Event date： 2016.10

    Language：English  

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  • High Temperature Ferromagnetism in (In,Fe)As Grown on Vicinal GaAs Substrates International conference

    Munehiko Yoshida, Akihide Nagamine, Masaaki Tanaka, Pham Nam Hai

    61st Annual Conference on Magnetism and Magnetic Materials (2016 MMM)  2016.10 

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    Language：English   Presentation type：Poster presentation  

    Venue：New Orleans  

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  • 高性能鉄系強磁性半導体の創生と半導体スピンデバイスへの応用

    PHAMNAM HAI

    東京工業大学H28年度スピントロニクスイノベーション研究推進体研究会 「スピンとIoT」  2016.10 

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  • Electronic Structure of the p-type Ferromagnetic Semiconductor (Ga,Fe)Sb

    Shoya Sakamoto, Nguyen Thanh Tu, Yukiharu Takeda, Shin-ichi Fujimori, Pham Nam Hai, Le Duc Anh, Yuki Wakabayashi, Goro Shibata, Masafumi Horio, Keisuke Ikeda, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori

    第77回応用物理学会秋季学術講演会  2016.9 

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    Event date： 2016.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：新潟  

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  • Bias-dependent magneto-conductance in n-type ferromagnetic semiconductor (In,Fe)As-based Esaki diodes

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    第77回応用物理学会秋季学術講演会  2016.9 

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    Event date： 2016.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：新潟  

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  • Giant spin dependent transport characteristics in Fe-doped ferromagnetic semiconductor p-n junctions

    Yuto Arakawa, Tomohiro Otsuka, Masaaki Tanaka, Pham Nam Hai

    第77回応用物理学会秋季学術講演会  2016.9 

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    Venue：新潟  

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  • Epitaxial Growth and Characterization of Bi1-xSbx Spin Hall Alloy on GaAs(111) Substrates International conference

    Yugo Ueda, Pham Nam Hai

    19th International Conference on Molecular Beam Epitaxy (MBE2016)  2016.9 

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    Event date： 2016.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Montpellier  

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  • Giant spin dependent transport characteristics in Fe-doped ferromagnetic semiconductor p-n junctions

    Arakawa Yuto, Otsuka Tomohiro, Tanaka Masaaki, Nam Hai Pham

    JSAP Annual Meetings Extended Abstracts  2016.9  The Japan Society of Applied Physics

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    Event date： 2016.9

    Language：Japanese  

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  • Spin transport in nanoscale silicon channels

    Duong Dinh Hiep, Masaaki Tanaka, Pham Nam Hai

    9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)  2016.8 

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    Event date： 2016

    Language：English  

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  • Spontaneous spin-split band structure of n-type ferromagnetic semiconductor (In,Fe)As observed by tunneling spectroscopy

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)  2016.8 

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    Event date： 2016

    Language：English  

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  • Giant spin-valve effect in (Ga,Fe)Sb/(In,Fe)As ferromagnetic p-n junctions

    Tomohiro Otsuka, Yuto Arakawa, Masaaki Tanaka, Pham Nam Hai

    9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)  2016.8 

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    Event date： 2016

    Language：English  

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  • Epitaxial growth of Bi1-xSbx spin-Hall alloy on GaAs(111) substrates

    Ueda Yugo, Nam Hai Pham

    JSAP Annual Meetings Extended Abstracts  2016.3  The Japan Society of Applied Physics

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    Event date： 2016.3

    Language：Japanese  

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  • Magnetic properties of (In,Fe)As grown on vicinal GaAs substrates

    Akihide Nagamine, Munehiko Yoshida, Masaaki Tanaka, Namhai Pham

    The 63th JSAP Spring Meeting  2016 

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    Event date： 2016.3

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • High-temperature ferromagnetism in heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaki

    2016 COMPOUND SEMICONDUCTOR WEEK (CSW) INCLUDES 28TH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE & RELATED MATERIALS (IPRM) & 43RD INTERNATIONAL SYMPOSIUM ON COMPOUND SEMICONDUCTORS (ISCS)  2016 

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    Event date： 2016

    Language：English  

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  • High-temperature ferromagnetism in heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaki

    2016 COMPOUND SEMICONDUCTOR WEEK (CSW) INCLUDES 28TH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE & RELATED MATERIALS (IPRM) & 43RD INTERNATIONAL SYMPOSIUM ON COMPOUND SEMICONDUCTORS (ISCS)  2016 

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    Event date： 2016

    Language：English  

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  • High-temperature ferromagnetism in heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    第20回スピン工学の基礎と応用(PASPS-20)  2015.12 

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    Event date： 2015.12

    Language：English   Presentation type：Oral presentation (general)  

    Venue：仙台市  

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  • (Invited) Control of magnetic properties by manipulating the carrier wavefunction in n-type ferromagnetic semiconductor (In,Fe)As quantum wells Invited International conference

    Le Duc Anh, Pham NamHai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    Vietnamese-Japanese Students' Scientific Exchange Meeting 2015  2015.10 

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    Event date： 2015.10

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Osaka  

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  • Magnetic Properties and Intrinsic Ferromagnetism in Narrow-gap Ferromagnetic Semiconductor (Ga,Fe)Sb International conference

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    SSDM 2015  2015.9 

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    Event date： 2015.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Japan  

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  • (Invited) Ferromagnetic semiconductors and heterostructures for semiconductor spintronics: Wavefunction engineering using n-type electron-induced ferromagnetic semiconductor (In,Fe)As Invited International conference

    Masaaki Tanaka, Le Duc Anh, Pham Nam Hai

    12th Sweden - Japan QNANO Workshop  2015.9 

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    Event date： 2015.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Sweden  

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  • High-temperature ferromagnetism in heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb

    Tu Nguyen, Nam Hai Pham, Duc Anh Le, Masaaki Tanaka

    第76回応用物理学会秋期学術講演会  2015.9 

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    Event date： 2015.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：名古屋  

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  • Growth and characterization of insulating ferromagnetic semiconductor (Al,Fe)Sb

    Anh Le, Daiki Kaneko, Pham Nam Hai, Masaaki Tanaka

    第76回応用物理学会秋期学術講演会  2015.9 

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    Event date： 2015.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：名古屋  

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  • Continuous visible-light emission at room temperature in Mn-doped GaAs and Si light-emitting diodes (Presentation Recording)

    Masaaki Tanaka, Pham Nam Hai, Le Duc Anh

    Spintronics VIII  2015.9  SPIE

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    Event date： 2015.9

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  • (Invited) Continuous visible-light emission at room temperature in Mn-doped GaAs and Si light-emitting diodes Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Le Duc Anh

    SPIE Nano Science + Engineering, Spintronics Symposium  2015.8 

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    Event date： 2015.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：USA  

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  • Electrical control of ferromagnetism in InAs /(In,Fe)As/ InAs trilayer quantum wells by wavefunction engineering International conference

    Duc Anh Le, Nam Hai Pham, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    17th International Conference on Modulated Semiconductor Structures (MSS17)  2015.7 

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    Event date： 2015.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sendai  

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  • Room temperature visible-light electroluminescence in Si p-n junctions with an epitaxial Mn doped Si layer International conference

    Pham Nam Hai, Daiki Maruo, Le Duc Anh, Masaaki Tanaka

    17th International Conference on Modulated Semiconductor Structures (MSS17)  2015.7 

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    Event date： 2015.7

    Language：English   Presentation type：Poster presentation  

    Venue：Sendai  

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  • (Invited) Electrical control of magnetic properties in n-type ferromagnetic semiconductor (In,Fe)As quantum wells Invited International conference

    Le Duc Anh, Pham NamHai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    EMN Istanbul Meeting  2015.7 

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    Event date： 2015.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Istanbul  

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  • Room temperature reddish-yellow electroluminescence in manganese-doped silicon light-emitting diodes International conference

    Pham Nam Hai, Daiki Maruo, Le Duc Anh, Masaaki Tanaka

    APS March meeting 2015  2015.3 

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    Event date： 2015.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：San Antonio, T.X.  

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  • Visible-light electroluminescence in Mn-doped GaAs light-emitting diodes International conference

    Daiki Maruo, Pham Nam Hai, Masaaki Tanaka

    APS March meeting 2015  2015.3 

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    Event date： 2015.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：San Antonio, T.X.  

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  • New Narrow Gap III-V Ferromagnetic Semiconductors

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    2015.3 

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    Event date： 2015.3

    Language：English   Presentation type：Oral presentation (general)  

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  • [講演奨励賞記念講演][招待講演]Electrical modulation of ferromagnetism via controlling the wavefunction in n-type ferromagnetic semiconductor (In,Fe)As quantum wells Invited

    Duc Anh Le, Nam Hai Pham, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    第62回応用物理学会春季学術講演会  2015.3 

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    Event date： 2015.3

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：神奈川県  

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  • Magneto-optical and magneto-transport characteristics of heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb

    Thanh Tu Nguyen, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    第62回応用物理学会春季学術講演会  2015.3 

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    Event date： 2015.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • フェムト秒レーザーによるYIG光磁気造形を利用した磁気光学回路

    雨宮智宏, コ シチン, 石川篤, 庄司雄哉, ファム ナム ハイ, 田中雅明, 水本哲弥, 田中拓男, 荒井滋久

    第62回応用物理学会春季学術講演会  2015.3 

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    Event date： 2015.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • Magneto-optical integrated circuits by femtosecond laser modeling in YIG

    Amemiya Tomohiro, Gu Zhichen, Ishikawa Atsushi, Shoji Yuya, Nam Hai Pham, Tanaka Masaaki, Mizumoto Tetsuya, Tanaka Takuo, Arai Shigehisa

    JSAP Annual Meetings Extended Abstracts  2015.2  The Japan Society of Applied Physics

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    Event date： 2015.2

    Language：Japanese  

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  • (Ga,Fe)Sb: a new p-type ferromagnetic semiconductor

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    The 19th Physics and Applications of Spin-related Phenomena in Semiconductors  2014.12 

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    Event date： 2014.12

    Language：English   Presentation type：Poster presentation  

    Venue：東京  

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  • (Invited) Fe-based ferromagnetic semiconductors and their heterostructures

    Pham Nam Hai

    The 19th Physics and Applications of Spin-related Phenomena in Semiconductors  2014.12 

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    Event date： 2014.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：東京  

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  • N 型強磁性半導体(In,Fe)As 量子井戸における波動関数制御による電気的な磁性変調

    レデゥックアイン, ファム ナム ハイ, 笠原裕一, 岩佐義宏, 田中雅明

    The 19th Physics and Applications of Spin-related Phenomena in Semiconductors  2014.12 

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    Event date： 2014.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • n 型強磁性半導体(In,Fe)As:Be のXMCD による磁化過程の研究

    坂本 祥哉, レ デュック アィン, ファム ナム ハイ, 芝田 悟朗, 竹田 幸治, 高橋 文雄, 小出 常晴, 田中 雅明, 藤森 淳

    The 19th Physics and Applications of Spin-related Phenomena in Semiconductors  2014.12 

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    Event date： 2014.12

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • (Ga,Fe)Sb: a new p-type ferromagnetic semiconductor

    Thanh Tu Nguyen, Duc Anh Le, Nam Hai Pham, Masaaki Tanaka

    第75回応用物理学会秋期学術講演会  2014.9 

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    Event date： 2014.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • Enhancement of ferromagnetism by manipulating the wavefunctions in n-type ferromagnetic semiconductor (In,Fe)As quantum wells

    Duc Anh Le, Nam Hai Pham, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    第75回応用物理学会秋期学術講演会  2014.9 

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    Event date： 2014.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • Magnetization Process of the n-type Ferromagnetic Semiconductor (In,Fe)As:Be Studied by X-ray Magnetic Circular Dichroism

    Shoya Sakamoto, Anh Le Duc, Hai Pham Nam, Goro Shibata, Yukio Takahashi, Yukiharu Takeda, Masaki Kobayashi, Tsuneharu Koide, Masaaki Tanaka, Atsushi Fujimori

    第75回応用物理学会秋期学術講演会  2014.9 

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    Event date： 2014.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • (Invited) Continuous visible-light emission at room temperature in Mn-doped Si light-emitting diodes Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Shinobu Ohya

    2nd International Conference and Exhibition on Lasers, Optics & Photonics  2014.9 

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    Event date： 2014.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Philadelphia  

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  • Epitaxial Growth and Characterization of a New P-type Ferromagnetic Semiconductor (Ga,Fe)Sb International conference

    Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    18th International Conference on Molecular Beam Epitaxy (MBE 2014)  2014.9 

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    Event date： 2014.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Flagstaff, A.Z.  

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  • Room-temperature Visible-light Electroluminescence in Light Emitting Diodes with an Epitaxial Mn-doped Si Layer International conference

    Pham Nam Hai, Daiki Maruo, Le Duc Anh, Masaaki Tanaka

    8th International Conference on Molecular Beam Epitaxy (MBE 2014)  2014.9 

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    Event date： 2014.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Flagstaff, A.Z.  

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  • (Invited) Electron-induced ferromagnetism in Fe-doped narrow-gap semiconductors Invited International conference

    Pham Nam Hai, Le Duc Anh, Daisuke Sasaki, Masaaki Tanaka

    15th International Union of Materials Research Societies, International Conference in Asia (IUMRS-ICA 2014)  2014.8 

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    Event date： 2014.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Fukuoka  

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  • (Invited) Recent progress in III-V based ferromagnetic semiconductors: N-type (In,Fe)As and its heterostructures Invited International conference

    M. Tanaka, P. N. Hai, L. D. Anh

    SPIE Nano Science + Engineering, Spintronics Symposium  2014.8 

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    Event date： 2014.8

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Diego  

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  • Electrical Control of Ferromagnetism by Wave Function Engineering in n-type Ferromagnetic Semiconductor (In,Fe)As Quantum Wells International conference

    Le Duc Anh, Pham NamHai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    32th International Conference on the Physics of Semiconductors (ICPS 2014)  2014.8 

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    Event date： 2014.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Austin, T.X.  

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  • Reddish-Yellow Visible-Light Electroluminescence in Manganese-Doped Silicon Light-Emitting Diodes International conference

    Pham Nam Hai, Daiki Maruo, Le Duc Anh, Masaaki Tanaka

    32th International Conference on the Physics of Semiconductors (ICPS 2014)  2014.8 

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    Event date： 2014.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Austin, T.X.  

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  • Electrical control of ferromagnetism by wavefunction engineering in a ferromagnetic trilayer (InAs/(In,Fe)As/InAs) quantum well International conference

    Le Duc Anh, Pham NamHai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    8th International Conference on Physics and Applications of Spin Phenomena in Solids (PASPS VIII)  2014.7 

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    Event date： 2014.7 - 2014.8

    Language：English   Presentation type：Poster presentation  

    Venue：Washington D.C.  

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  • Interplay between strain, quantum confinement, and ferromagnetism in strained (In,Fe)As thin films International conference

    Pham Nam Hai, Daisuke Sasaki, Le Duc Anh, Masaaki Tanaka

    8th International Conference on Physics and Applications of Spin Phenomena in Solids (PASPS VIII)  2014.7 

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    Event date： 2014.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Washington D.C.  

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  • (Invited) Optical and magnetic microstructures in YIG ferrite fabricated by femtosecond laser Invited International conference

    Atsushi Ishikawa, Tomohiro Amemiya, Yuya Shoji, P. N. Hai, Masaaki Tanaka, Tetsuya Mizumoto, Shigehisa Arai, Takuo Tanaka

    The 15th Int’l Symposium on Laser Precision Microfabrication (LPM 2014)  2014.6 

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    Event date： 2014.6

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Vilnius, Lithuania  

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  • Three-dimensional Nanostructuring in YIG Ferrite with Femtosecond Laser International conference

    Tomohiro Amemiya, Atsushi Ishikawa, Yuya Shoji, P.N. Hai, Masaaki Tanaka, Tetsuya Mizumoto, Takuo Tanaka, Shigehisa Arai

    The Conference on Lasers and Electro-Optics 2014 (CLEO 2014)  2014.6 

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    Event date： 2014.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：San Jose, CA, USA  

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  • (Invited) Recent Progress in Ferromagnetic Semiconductors Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Shinobu Ohya

    6th Indo-Japan Seminar 'Physics and Design of Multi-Functional Correlated Materials  2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Tokyo  

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  • Continuous reddish-yellow visible-light emission at room temperature in Mn-doped Si surface light-emitting diodes

    Namhai Pham, Daiki Maruo, DucAnh Le, Masaaki Tanaka

    第61回応用物理学会春期学術講演会  2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • Electrical control of ferromagnetism in n-type ferromagnetic semiconductor (In,Fe)As quantum wells

    Le Duc Anh, Pham NamHai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    第61回応用物理学会春期学術講演会  2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • マンガンを添加したガリウム砒素発光ダイオードにおける可視光電界励起発光

    丸尾大貴, ファム ナム ハイ, 田中雅明

    第61回応用物理学会春期学術講演会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • Interplay between strain, quantum confinement, and ferromagnetism in strained ferromagnetic semiconductor (In,Fe)As

    Daisuke Sasaki, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    第61回応用物理学会春期学術講演会  2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Poster presentation  

    Venue：神奈川県  

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  • Epitaxial Growth and Characterization of n-type Magnetic Semiconductor (In,Co)As

    T. Nguyen, D. A. Le, N. H. Pham, M. Tanaka

    第61回応用物理学会春期学術講演会  2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Poster presentation  

    Venue：神奈川県  

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  • (Invited) Electron-induced ferromagnetism in Fe-doped semiconductors Invited

    Pham Nam Hai, Le Duc Anh, Daisuke Sasaki, Masaaki Tanaka

    東京大学 固体エレクトロニク・光エレクトロニク研究会  2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • フェムト秒レーザーによるYIGフェライト3次元光造形

    雨宮智宏, 石川篤, 庄司雄哉, P. N. Hai, 田中雅明, 水本哲弥, 田中拓男, 荒井滋久

    平成26年春季応用物理学会学術講演会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • フェムト秒レーザーを用いたCe:YIGへの3次元光ナノ加工

    石川篤, 庄司雄哉, 雨宮智宏, P. N. Hai, 田中雅明, 水本哲弥, 田中拓男, 荒井滋久

    平成26年春季第61回応用物理学会学術講演会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • Visible-light electroluminesence in Mn-doped GaAs light-emitting diodes

    Daiki Maruo, Pham Nam Hai, Masaaki Tanaka

    東京大学第５回低温センター研究交流会  2014.2 

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    Event date： 2014.2

    Language：English   Presentation type：Poster presentation  

    Venue：東京  

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  • Epitaxial Growth and Characterization of n-type Magnetic Semiconductor (In,Co)As

    Nguyen Thanh Tu, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    東京大学第５回低温センター研究交流会  2014.2 

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    Event date： 2014.2

    Language：English   Presentation type：Poster presentation  

    Venue：東京  

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  • Interplay between strain, quantum confinement, and ferromagnetism in strained ferromagnetic semiconductor (In,Fe)As

    Daisuke Sasaki, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    東京大学第５回低温センター研究交流会  2014.2 

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    Event date： 2014.2

    Language：English   Presentation type：Poster presentation  

    Venue：東京  

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  • Electrical control of ferromagnetism in n-type ferromagnetic semiconductor (In,Fe)As quantum wells

    Le Duc Anh, Pham Nam Hai, Yuichi Kasahara, Yoshihiro Iwasa, Masaaki Tanaka

    東京大学第５回低温センター研究交流会  2014.2 

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    Event date： 2014.2

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 強磁性半導体(In,Fe)As:Beの磁化過程のXMCDによる研究

    坂本祥哉, LE Duc Anh, PHAM Nam Hai, 芝田悟朗, 高橋文雄, 小林正起, 竹田幸治, 山上浩志, 山上浩志, 斎藤祐児, 小出常晴, 田中雅明, 藤森淳

    物構研サイエンスフェスタ要旨集  2014 

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    Event date： 2014

    Language：Japanese  

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  • Three-dimensional nanostructuring in YIG ferrite with femtosecond laser

    Tomohiro Amemiya, Atsushi Ishikawa, Yuya Shoji, Pham Nam Hai, Masaaki Tanaka, Tetsuya Mizumoto, Takuo Tanaka, Shigehisa Arai

    Optics InfoBase Conference Papers  2014  Optical Society of America (OSA)

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    Event date： 2014

    Language：English  

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  • XMCD measurements of ferromagnetic semiconductor (In,Fe)As

    S. Sakamoto, M. Kobayashi, G. Shibata, Y. Takahashi, A. Fujimori, T. Koide, Y. Takeda, Y. Saitoh, H. Yamagami, L. Duc Anh, P. N. Hai, M. Tanaka

    第18回半導体スピン工学の基礎と応用（PASPS-18）  2013.12 

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    Event date： 2013.12

    Language：English  

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  • （招待講演）Ｎ型電子誘起強磁性半導体(In,Fe)As ~次世代強磁性半導体の開発に向けて~ Invited

    ファム ナム ハイ

    東北大通研共同プロジェクト・組織連携型「スピントロニクス国際連携」秋特別講演会  2013.10 

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    Event date： 2013.10

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：宮城県刈田郡蔵王町  

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  • (Invited) Recent progress of ferromagnetic semiconductors N-type electron-induced ferromagnetic semiconductor (In,Fe)As Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Le Duc Anh, Daisuke Sasaki

    International Conference and Exhibition on Lasers, Optics & Photonics (Optics 2013)  2013.10 

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    Event date： 2013.10

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：San Antonio, TX  

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  • Epitaxial growth and properties of n-type magnetic semiconductor (In,Co)As International conference

    Nguyen Thanh Tu, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    2013 International Conference on Solid State Devices and Materials (SSDM 2013)  2013.9 

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    Event date： 2013.9

    Language：English   Presentation type：Poster presentation  

    Venue：Fukuoka  

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  • (Invited) Spin-dependent transport phenomena in III-V semiconductor heterostructures with ferromagnetic MnAs nano-scale particles Invited International conference

    Pham Nam Hai, Masaaki Tanaka

    Vietnamese-Japanese Students’ Scientific exchange meeting 2013  2013.9 

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    Event date： 2013.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Osaka  

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  • Siドープn型強磁性半導体(In,Fe)Asの結晶成長および特性評価

    古川 惣一朗, ファム ナム ハイ, レ デゥック アィン, 田中 雅明

    2013年秋季第74回応用物理学会学術講演会  2013.9 

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    Event date： 2013.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Spin-dependent transport phenomena in ferromagnetic MnAs nano-scale particles/ GaAs semiconductor hybrid system International conference

    Pham Nam Hai, Masaaki Tanaka

    IXth Rencontres du Vietnam (Nanophysics: from fundamentals to applications)  2013.8 

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    Event date： 2013.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Quynhon  

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  • Effects of co-doping on electronic and magnetic properties of n-type electron-induced ferromagnetic semiconductor (In,Fe)As International conference

    Pham Nam Hai, Soichiro Furukawa, Le Duc Anh, Masaaki Tanaka

    Spintech VII  2013.7 

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    Event date： 2013.7 - 2013.8

    Language：English   Presentation type：Poster presentation  

    Venue：Chicago, Illinois  

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  • (Invited) Recent progress of ferromagnetic semiconductors: Electron-induced n-type ferromagnetic semiconductor (In,Fe)As Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Le Duc Anh, Shinobu Ohya

    The 16th International Symposium on the Physics of Semiconductors and Applications (ISPSA-XVI)  2013.7 

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    Event date： 2013.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Jeju  

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  • 強磁性半導体(InFe)As量子井戸構造における量子サイズ効果および波動関数制御によるキュリー温度の変調

    レ デゥック アィン, ファム ナム ハイ, 田中 雅明

    東京大学第4回低温センター研究交流会  2013.3 

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    Event date： 2013.3

    Language：Japanese  

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  • Control of ferromagnetism by moving the electron wavefunction in ferromagnetic semiconductor (In,Fe)As quantum wells International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    12th Joint MMM/Intermag Conference  2013.1 

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    Event date： 2013.1

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Chicago, Illinois  

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  • (Invited) Spintronics materials and devices - ferromagnetic semiconductors and hetero structures Invited International conference

    Masaaki Tanaka, Shinobu Ohya, Pham Nam Hai, Ryosyo Nakane

    2012 Conference on Optoelectronic and Microelectronic Materials & Devices (COMMAD)  2012.12 

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    Event date： 2012.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Melbourne  

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  • Anisotropic magnetoresistance in n-type electron-induced ferromagnetic semiconductor (In,Fe)As: two-fold and eight-fold symmetry International conference

    Daisuke Sasaki, Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    The 17th International Conference on Molecular Beam Epitaxy (MBE2012)  2012.9 

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    Event date： 2012.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Nara  

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  • (Invited) Spin-dependent resonant tunneling and the valence-band picture of III-V-based ferromagnetic semiconductors Invited International conference

    S. Ohya, I. Muneta, K. Takata, Y. Xin, P. N. Hai, M. Tanaka

    17th International Conference on Molecular Beam Epitaxy  2012.9 

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    Event date： 2012.9

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Nara  

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  • 強磁性半導体(In,Fe)As超薄膜ヘテロ構造における量子サイズ効果

    レ デゥック アィン, ファム ナム ハイ, 田中 雅明

    2012年度第73回秋季応用物理学会学術講演会  2012.9 

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    Event date： 2012.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：愛知  

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  • Making n-type electron-induced ferromagnetic semiconductor with tetrahedral Fe-As bonding International conference

    Pham Nam Hai, Le Duc Anh, Daisuke Sasaki, Masaaki Tanaka

    The 7th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-VII)  2012.8 

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    Event date： 2012.8

    Language：English   Presentation type：Poster presentation  

    Venue：Eindhoven  

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  • Properties of ferromagnetic n-type (In,Fe)As: quantum size effect and crystalline anisotropic magnetoresistance International conference

    Le Duc Anh, Daisuke Sasaki, Pham Nam Hai, Masaaki Tanaka

    The 7th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-VII)  2012.8 

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    Event date： 2012.8

    Language：English   Presentation type：Poster presentation  

    Venue：Eindhoven  

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  • (In,Fe)As: A new n-type electron-induced ferromagnetic semiconductor with tetrahedral Fe-As bonding International conference

    Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    31th International Conference on the Physics of Semiconductors (ICPS2012)  2012.7 

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    Event date： 2012.7 - 2012.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Zurich  

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  • (Invited) N-type electron-induced ferromagnetic semiconductor (In,Fe)As Invited International conference

    Pham Nam Hai, Le Duc Anh, Daisuke Sasaki, Masaaki Tanaka

    Nature Conference “Frontiers in Electronic Materials"  2012.6 

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    Event date： 2012.6

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Aachen  

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  • (Invited) Iron-Based n-Type Electron-Induced Ferromagnetic Semiconductor Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Le Duc Anh

    International Conference on Superconductivity and Magnetism (ICSM 2012)  2012.5 

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    Event date： 2012.4 - 2012.5

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Istanbul  

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  • 強磁性半導体(In,Fe)Asにおける異方性磁気抵抗効果と結晶磁気異方性

    佐々木 大輔, ファム ナム ハイ, レ デゥック アィン, 田中 雅明

    超微細リソグラフィー・ナノ計測拠点終了シンポジウム  2012.3 

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    Event date： 2012.3

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • 電子誘起強磁性半導体(In,Fe)Asにおける異方性磁気抵抗効果と磁気異方性

    佐々木 大輔, ファム ナム ハイ, レ デゥック アィン, 田中 雅明

    2012年春季第59回応用物理学会学術講演会  2012.3 

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    Event date： 2012.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 電子誘起強磁性半導体(In,Fe)Asにおける強磁性ドメイン構造

    ファム ナム ハイ, レ デゥック アィン, Mohan Shyam, 為ヶ井 強, 田中 雅明

    2012年春季第59回応用物理学会学術講演会  2012.3 

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    Event date： 2012.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Intrinsic ferromagnetism in (In,Fe)As and its dependence on Fe concentration International conference

    Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    International Symposium on Secure-Life Electronics  2012.1 

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    Event date： 2012.1

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Spintronics: Materials and Devices International conference

    Masaaki Tanaka, Pham Nam Hai, Le Duc Anh, Shyam Mohan, Tsuyoshi Tamegai

    International Symposium on Secure-Life Electronics  2012.1 

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    Event date： 2012.1

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Spintronics: Materials and Devices: A New Spin on Semiconductors - Spintronics Research Opens the Way to New Semiconductor Technology International conference

    Masaaki Tanaka, Shinobu Ohya, Ryosyo Nakane, Pham Nam Hai, Shinsuke Yada, Ryota Akiyama, Yoshisuke Ban, Shoichi Sato, Iriya Muneta, Ryohei Okazaki, Le Duc Anh

    International Symposium on Secure-Life Electronics  2012.1 

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    Event date： 2012.1

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • N-type electron-induced ferromagnetic semiconductor with tetrahedral Fe-As bonding International conference

    Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    International Symposium on Secure-Life Electronics  2012.1 

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    Event date： 2012.1

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • Properties of n-type ferromagnetic semiconductor (In,Fe)As: Fe concentration and thickness dependence International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    2nd International Workshop on Magnetic Materials and Nanostructures  2012.1 

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    Event date： 2012.1

    Language：English   Presentation type：Poster presentation  

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  • (Invited) A new Fe-based n-type electron-induced ferromagnetic semiconductor:(In,Fe)As Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Duc Anh Le

    2nd International Workshop on Magnetic Materials and Nanostructures  2012.1 

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    Event date： 2012.1

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Tokai, Ibaraghi  

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  • Spintronics Materials and Devices - Ferromagnetic Semiconductors and Heterostructures

    Masaaki Tanaka, Shinobu Ohya, Pham Nam Hai, Ryosho Nakane

    2012 CONFERENCE ON OPTOELECTRONIC AND MICROELECTRONIC MATERIALS AND DEVICES (COMMAD 2012)  2012 

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    Event date： 2012

    Language：English  

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  • 強磁性半導体(In,Fe)As における異方性磁気抵抗効果と磁気異方性

    佐々木 大輔, ファム ナム ハイ, レ デゥック アィン, 田中 雅明

    第16回半導体スピン工学の基礎と応用（PASPS-16）  2011.11 

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    Event date： 2011.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 新しいn型電子誘起強磁性半導体(In,Fe)As

    ファム ナム ハイ, レ デゥック アィン, 田中 雅明

    第16回半導体スピン工学の基礎と応用（PASPS-16）  2011.11 

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    Event date： 2011.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 極薄InFeAsにおける磁気円二色性スペクトルのブルーシフトの観測

    レ デゥック アィン, ファム ナム ハイ, 田中 雅明

    第16回半導体スピン工学の基礎と応用（PASPS-16）  2011.11 

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    Event date： 2011.11

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • (Invited) Valence-band structure of (III,Mn)As ferromagnetic semiconductors Invited International conference

    S. Ohya, I. Muneta, K. Takata, Y. Xin, P. N. Hai, M. Tanaka

    Joint Polish-Japanese Workshop “Spintronics - from new materials to applications”  2011.11 

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    Event date： 2011.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Warsaw  

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  • (Invited) Top-down and bottom-up fabrication of nano-scale spintronic devices and their spin-dependent transport characteristics Invited International conference

    Pham Nam Hai, Masaaki Tanaka

    3rd International Workshop on Nanotechnology and application (IWNA 2011)  2011.11 

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    Event date： 2011.11

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hochiminh City  

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  • Intrinsic ferromagnetism in (In,Fe)As and its dependence on Fe concentration International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    56th Annual Magnetism and Magnetic Materials (MMM) Conference  2011.10 

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    Event date： 2011.10 - 2011.11

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Scottsdale, Arizona  

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  • (In,Fe)As: A new Fe-based n-type electron-induced ferromagnetic semiconductor International conference

    Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    56th Annual Magnetism and Magnetic Materials (MMM) Conference  2011.10 

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    Event date： 2011.10 - 2011.11

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Scottsdale, Arizona  

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  • 鉄系n型電子誘起強磁性半導体(In,Fe)As

    ファム ナム ハイ, レ デゥック アィン, 田中 雅明

    2011年秋季第72回応用物理学会学術講演会  2011.9 

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    Event date： 2011.8 - 2011.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：山形  

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  • N型強磁性半導体InFeAsにおける磁気円二色性、異常ホール効果と磁化特性

    レ デゥック アィン, ファム ナム ハイ, 田中 雅明

    2011年秋季第72回応用物理学会学術講演会  2011.9 

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    Event date： 2011.8 - 2011.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：山形  

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  • A new Fe-based n-type ferromagnetic semiconductor (In,Fe)As International conference

    Pham Nam Hai, Le Duc Anh, Masaaki Tanaka

    6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6)  2011.8 

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    Event date： 2011.8

    Language：English   Presentation type：Poster presentation  

    Venue：Matsue, Shimane  

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  • Correlation between magnetic circular dichroism, anomalous Hall effect and magnetization in (In,Fe)As International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6)  2011.8 

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    Event date： 2011.8

    Language：English   Presentation type：Poster presentation  

    Venue：Matsue, Shimane  

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  • Magnetoresistance induced by spin-dependent inelastic cotunneling in a ferromagnetic MnAs nanoparticle with non-magnetic electrodes International conference

    R. Akiyama, S. Ohya, P. N. Hai, M. Tanaka

    6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6)  2011.8 

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    Event date： 2011.8

    Language：English   Presentation type：Poster presentation  

    Venue：Matsue, Shimane  

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  • (Invited) Valence-band structure of the ferromagnetic semiconductor GaMnAs Invited International conference

    S. Ohya, K. Takata, I. Muneta, P. N. Hai, Y. Xin, M. Tanaka

    5th International Workshop on Spin Currents  2011.7 

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    Event date： 2011.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Sendai, Miyaghi  

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  • (Invited) Iron-based n-type electron induced ferromagnetic semiconductor Invited

    Pham Nam Hai

    日本原子力研究機構 先端基礎研究センターセミナー  2011.6 

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    Event date： 2011.6

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • (Invited) III-V based magnetic heterostructures and nanostructures: Bandstructure, spin dependent tunneling, and magnetoresistance Invited International conference

    Masaaki Tanaka, Pham Nam Hai, Iriya Muneta, Shinobu Ohya

    Sweden-Japan Workshop on Quantum Nanoelectronics (QNANO 2011)  2011.6 

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    Event date： 2011.6

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Visby  

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  • (Invited) Resonant tunneling spectroscopy and valence-band picture of the ferromagnetic semiconductor GaMnAs Invited International conference

    S. Ohya, I. Muneta, K. Takata, P. N. Hai, M. Tanaka

    International Magnetics Conference 2011 (Intermag 2011)  2011.4 

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    Event date： 2011.4

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Taipei  

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  • Magnetoresistance due to inelastic spin-flip cotunneling within Coulomb blockade regime in III-V semiconductor / MnAs nanoparticle heterostructures International conference

    Ryota Akiyama, Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    2011 APS Annual March Meeting  2011.3 

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    Event date： 2011.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Dallas, Texas  

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  • A new Fe-based n-type ferromagnetic semiconductor International conference

    Le Duc Anh, Pham Nam Hai, Masaaki Tanaka

    5th International Workshop on Spin Currents  2011.1 

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    Event date： 2011.1

    Language：English   Presentation type：Poster presentation  

    Venue：Sendai, Miyagi  

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  • 軟X線磁気円二色性による希薄磁性半導体Ga1-xMnxAsの熱処理前後におけるスピン電子状態変化の研究

    竹田幸治, 岡根哲夫, 藤森淳, 斎藤祐児, 山上浩志, 山上浩志, 大矢忍, HAI P. N., 田中雅明

    日本物理学会講演概要集  2011 

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    Event date： 2011

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  • Phase decomposition diagram of magneticalloy semiconductor

    Pham Nam Hai, Shinsuke Yada, Masaaki Tanaka

    The 15 Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors (PASPS-15)  2010.12 

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    Event date： 2010.12

    Language：Japanese   Presentation type：Poster presentation  

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  • クーロンブロッケード領域内における非弾性スピンフリップコトンネルによる磁気抵抗の増大

    秋山了太, 大矢忍, ファム ナム ハイ, 田中雅明

    15回半導体スピン工学の基礎と応用  2010.12 

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    Event date： 2010.12

    Language：Japanese   Presentation type：Poster presentation  

    Venue：筑波、茨城  

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  • Long spin-relaxation time (10μs) in a single ferro magnetic-metal MnAs nanoparticle International conference

    Pham Nam Hai, Shinobu Ohya, Masaaki Tanaka

    55th Magnetism and Magnetic Materials Conference  2010.11 

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    Event date： 2010.11

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Atlanta, Georgia  

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  • Spin-dependent transport in a single-electron spin transistor International conference

    Pham Nam Hai

    University of Wurzburg - University of Tokyo Joint Workshop on Advances in Nanophotonics and Spintronics  2010.10 

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    Event date： 2010.10

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Wurzburg  

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  • 単一MnAs微粒子における長いスピン緩和時間

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    2010年秋季第71回応用物理学会学術講演会  2010.9 

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    Event date： 2010.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：長崎  

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  • (招待講演) 閃亜鉛鉱型MnAs磁性微粒子による起電力の発生 Invited

    Pham Nam Hai

    日本原子力研究機構 先端基礎研究センターセミナー  2010.8 

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    Event date： 2010.8

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Spin-dependent transport and long spin-relaxation time in a hexagonal MnAs nanoparticle International conference

    Pham Nam Hai, Shinobu Ohya, Masaaki Tanaka

    The 6th International Conference on Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS6)  2010.8 

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    Event date： 2010.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • Fermi level position and valence band structure in GaMnAs studied by spin-dependent resonant tunneling spectroscopy International conference

    Shinobu Ohya, Iriya Muneta, Pham Nam Hai, Masaaki Tanaka

    The 6th International Conference on Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS6)  2010.8 

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    Event date： 2010.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • (Invited) Emerging semiconductor spintronic devices and materials Invited International conference

    Pham Nam Hai, Masaaki Tanaka

    Solid State Systems Symposium (4S-2010)  2010.6 

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    Event date： 2010.6

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hochiminh City  

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  • (Invited) Electro motive force and huge magnetoresistance induced by zinc-blende MnAs nanomagnets Invited International conference

    Pham Nam Hai, R. Akiyama, Shinobu Ohya, Masaaki Tanaka

    The 37th International Symposium on Compound Semiconductors  2010.6 

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    Event date： 2010.5 - 2010.6

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Takamatsu, Kagawa  

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  • スピン依存共鳴トンネル分光を用いた強磁性半導体GaMnAsにおける価電子帯解析

    大矢 忍, 宗田伊理也, ファム ナム ハイ, 田中雅明

    2010年春季第57回応用物理学関係連合講演会  2010.3 

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    Event date： 2010.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • スピンバッテリーにおける起電力の構造依存特性

    秋山了太, ファム ナム ハイ, 田中雅明

    2010年春季第57回応用物理学関係連合講演会  2010.3 

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    Event date： 2010.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神奈川県  

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  • (招待講演) 強磁性半導体GaMnAsへテロ構造におけるスピン依存伝導 Invited

    大矢 忍, 宗田伊理也, ファム ナム ハイ, 高田健太, 田中雅明

    2010年春季第57回応用物理学関係連合講演会のシンポジウム「スピントロニクスデバイスの新展開」  2010.3 

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    Event date： 2010.3

    Language：Japanese   Presentation type：Oral presentation (keynote)  

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  • Investigation on the valence-band structure of ferromagnetic-semiconductor GaMnAs using spin-dependent resonant tunneling spectroscopy International conference

    Shinobu Ohya, Iriya Muneta, Pham Nam Hai, Masaaki Tanaka

    2010 APS Annual March Meeting  2010.3 

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    Event date： 2010.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Portland, Oregon  

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  • (Invited) Electromotive force and huge magnetoresistance in magnetic tunnel junctions with zinc-blende MnAs nano-magnets Invited International conference

    Pham Nam Hai

    2010 APS Annual March Meeting  2010.3 

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    Event date： 2010.3

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Portland, Oregon  

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  • Spinmotive force in magnetic tunnel junction International conference

    Pham Nam Hai, Masaaki Tanaka

    Joint Japan/Australia Workshop on Frontier Photonics and Electronics  2010.3 

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    Event date： 2010.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sydney  

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  • スピン偏極電流制御デバイスと材料物性の研究

    田中 雅明, 大矢 忍, 中根 了昌, ファム ナム ハイ, 矢田 慎介, 秋山 了太, 國谷 瞬, 佐藤 彰一, 宗田 伊理也

    特定領域研究「スピン流の創出と制御」平成21年度成果報告会  2010.1 

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    Event date： 2010.1

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • AlMnAs障壁を有する強磁性半導体GaMnAs磁気トンネル接合におけるトンネル磁気抵抗効果

    大矢 忍, 宗田 伊理也, ファム ナム ハイ, 田中 雅明

    特定領域研究「スピン流の創出と制御」平成21年度成果報告会  2010.1 

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    Event date： 2010.1

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • スピンバッテリーにおける起電力の構造依存特性

    秋山 了太, ファム ナム ハイ, 田中 雅明

    特定領域研究「スピン流の創出と制御」平成21年度成果報告会  2010.1 

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    Event date： 2010.1

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 軟Ｘ線磁気円二色性によるGa1-xMnxAsのアニール効果の研究2

    竹田 幸治, 岡根 哲夫, 藤森 淳, 斎藤 祐児, 山上 浩志, 大矢 忍, ファム ナム ハイ, 田中 雅明

    特定領域研究「スピン流の創出と制御」平成21年度成果報告会  2010.1 

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    Event date： 2010.1

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • スピンバッテリーにおける起電力の素子構造依存特性

    秋山了太, HAI Pham Nam, 田中雅明

    応用物理学関係連合講演会講演予稿集(CD-ROM)  2010 

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    Event date： 2010

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  • （招待講演） III-V/MnAs 磁気ナノ構造におけるスピン起電力および巨大な磁気抵抗効果 Invited

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    第14回半導体スピン工学の基礎と応用  2009.12 

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    Event date： 2009.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：神奈川県  

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  • スピンバッテリーにおける起電力の構造依存特性

    秋山 了太, ファム ナム ハイ, 田中 雅明

    第14回半導体スピン工学の基礎と応用  2009.12 

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    Event date： 2009.12

    Language：Japanese   Presentation type：Poster presentation  

    Venue：神奈川県  

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  • （招待講演） 六方晶MnAs ナノ微粒子におけるスピン緩和時間の評価 Invited

    ファム ナム ハイ

    特定領域研究（スピン流の創出と制御）第２回 若手研究交流会  2009.12 

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    Event date： 2009.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：筑波、茨城  

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  • Electromotive force and huge magnetoresistance in magnetic tunnel junctions with zinc-blende MnAs nanomagnets International conference

    Pham Nam Hai, Shinobu Ohya, Masaaki Tanaka

    International Symposium on Quantum Nanophotonics and Nanoelectronics (ISQNN 2009)  2009.11 

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    Event date： 2009.11 - 2010.11

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • AlMnAs障壁を有する強磁性半導体GaMnAs磁気トンネル接合におけるトンネル磁気抵抗効果

    大矢 忍, 宗田 伊理也, ファム ナム ハイ, 田中 雅明

    2009年秋季第70回応用物理学会学術講演会  2009.9 

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    Event date： 2009.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：富山  

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  • スピン起電力と超巨大磁気抵抗効果：素子構造依存性

    ファム ナム ハイ, 王 哲, 田中 雅明

    2009年秋季第70回応用物理学会学術講演会  2009.9 

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    Event date： 2009.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：富山  

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  • （招待講演） スピン起電力と超巨大磁気抵抗効果（実験）～ファラデー法則は超えられるか？ Invited

    ファム ナム ハイ, 大矢 忍, 田中 雅明, 前川 禎通, Stewart Barnes

    2009年秋季第70回応用物理学会学術講演会 シンポジウム “スピン流が生み出す新しい物性”  2009.9 

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    Event date： 2009.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：富山  

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  • MnAsナノ微粒子/III-V族半導体ヘテロ構造におけるスピン依存伝導 ～スピン起電力と巨大磁気抵抗効果

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    特定領域研究「スピン流の創出と制御」平成２1年度研究会  2009.8 

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    Event date： 2009.8

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • (Invited) Electromotive force and magnetoresistance (~100,000%) in magnetic tunnel junctions with zinc-blende MnAs nanomagnets Invited International conference

    P. N. Hai, S. Ohya, S.E. Barnes, S. Maekawa, M. Tanaka

    The 14th International Conference on Modulated Semiconductor structures (MSS-14)  2009.7 

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    Event date： 2009.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Kobe  

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  • Electromotive force and huge magneto resistance induced by zinc-blende MnAs nanomagnets in magnetic tunnel junctions International conference

    P. N. Hai, S. Ohya, S. E. Barnes, S. Maekawa, M. Tanaka

    The 5th international school and conference on spintronics and quantum information technology (Spintech V)  2009.7 

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    Event date： 2009.7

    Language：English   Presentation type：Poster presentation  

    Venue：Cracow  

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  • (Invited) Properties and Functionalities of GaAs:MnAs nanocomposites Invited International conference

    M. Tanaka, P. N. Hai, M. Yokoyama, S. Ohya

    The 5th international school and conference on spintronics and quantum information technology (Spintech V)  2009.7 

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    Event date： 2009.7

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Cracow  

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  • 閃亜鉛鉱型MnAs微粒子を含む半導体へテロ構造におけるスピン起電力と超巨大磁気抵抗効果

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    東京大学ナノ量子情報エレクトロニクスシンポジウム  2009.4 

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    Event date： 2009.4

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • III-V族強磁性半導体GaMnAsと量子へテロ構造におけるスピン依存伝導特性

    大矢 忍, 宗田 伊理也, ファム ナム ハイ, 田中 雅明

    東京大学ナノ量子情報エレクトロニクスシンポジウム  2009.4 

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    Event date： 2009.4

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • 強磁性半導体における相分離ダイアグラムの測定

    ファム ナム ハイ, 王哲, 田中 雅明

    第56回年春季応用物理学会関連連合講演会  2009.3 

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    Event date： 2009.3

    Language：Japanese  

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  • Long spin-relaxation time (10 μs) of a single ferromagnetic hexagonal MnAs nanoparticle embedded in a GaAs matrix

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    第13回「半導体スピン工学の基礎と応用」研究会(PASPS13)  2009.1 

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    Event date： 2009.1

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：仙台、宮城県  

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  • 閃亜鉛鉱型MnAsナノスケール微粒子を含むトンネル接合：巨大な磁気抵抗と静磁場による起電力効果

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    特定領域研究「スピン流の創出と制御」平成20年度成果報告会  2009.1 

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    Event date： 2009.1

    Language：Japanese   Presentation type：Poster presentation  

    Venue：仙台、宮城県  

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  • スピン偏極電流制御デバイスと材料物性の研究

    田中 雅明, 中根 了昌, 大矢 忍, A. M. ナズムル, ファム ナム ハイ, 矢田 慎介, 遠藤 裕幸

    特定領域研究「スピン流の創出と制御」平成20年度成果報告会  2009.1 

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    Event date： 2009.1

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：仙台、宮城県  

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  • (Invited) III-V Semiconductor-Based Ferromagnetic Heterostructures Invited International conference

    S. Ohya, P. N. Hai, M. Tanaka

    Asian Magnetics Conference 2008  2008.12 

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    Event date： 2008.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Busan  

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  • (Invited) Huge magnetoresistance and electromotive force in Zinc-Blende MnAs nanoparticles / III-V semiconductor hybrid structures Invited International conference

    M. Tanaka, P-N. Hai, S. Ohya

    13th Advanced Heterostructures and Nanostructures (AHNW)  2008.12 

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    Event date： 2008.12

    Language：English   Presentation type：Oral presentation (invited, special)  

    Venue：Hawai  

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  • 閃亜鉛鉱型MnAsナノスケール微粒子を含むトンネル接合における巨大な磁気抵抗と起電力効果

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    物性科学領域横断研究会―スピンが拓く物性科学の最前線―  2008.11 

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    Event date： 2008.11

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • Spin-dependent transport in Zinc-Blende MnAs nanoparticles / GaAs semiconductor hybrid structures International conference

    P. N. Hai, B.H. Yu, S. Ohya, M. Tanaka, S.E. Barnes, S. Maekawa

    53rd Magnetism and Magnetic Materials Conference  2008.10 

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    Event date： 2008.10

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Austin, Texas  

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  • Huge Magnetoresistance Effect in Semiconductor based Nanostructures with Zinc-blende MnAs Nanoparticles International conference

    P. N. Hai, B.H. Yu, S. Ohya, M. Tanaka

    2008 International Conference on Solid State Devices and Materials (SSDM2008)  2008.9 

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    Event date： 2008.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tsukuba, Ibaragi  

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  • Ga1-xMnxAsの内殻吸収磁気円二色性による磁気的相互作用の研究

    竹田幸治, 小林正起, 岡根哲夫, 大河内拓雄, 岡本 淳, 斎藤祐児, 小林 啓介, 山上浩志, 藤森 淳, 田中新, 岡林潤, 尾嶋正治, 大矢忍, ファム ナム ハイ, 田中雅明

    日本物理学会2008年秋季大会  2008.9 

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    Event date： 2008.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岩手  

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  • MnAs強磁性微粒子を用いた単電子スピントラジスタにおけるTMR振動とスピン蓄積

    ファム ナム ハイ, 大矢 忍, 田中 雅明

    平成20季講年第69回応用物理学会学術秋演会  2008.9 

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    Event date： 2008.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：愛知県  

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  • スピン偏極電流制御デバイスとその材料物性の研究：閃亜鉛鉱型MnAs微粒子を含む半導体ナノ構造における巨大な磁気抵抗効果とスピン起電力

    ファム ナム ハイ, 大矢忍, 中根了昌, A.M. ナズムル, 矢田慎介, 原田智之, 遠藤裕幸, 田中雅明

    第２回特定領域研究「スピン流」成果報告会  2008.7 

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    Event date： 2008.7

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：京都  

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  • Huge Magnetoresistance (~100,000%) in semiconductor based Magnetic Tunnel Junctions with Zinc-blende MnAs Nanoparticles International conference

    P. N. Hai, B.H. Yu, S. Ohya, M. Tanaka

    LMU/MUT-UT Bilateral Workshop on Nanoscale Systems  2008.7 

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    Event date： 2008.7

    Language：English   Presentation type：Poster presentation  

    Venue：Garching  

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  • 亜鉛鉱型MnAs微粒子を含む半導体ナノ構造における巨大な磁気抵抗効果(～100,000%)

    ファム ナム ハイ, ユ ビョンホ, 大矢 忍, 田中雅明

    平成20年春季第55回応用物理学会関連連合講演会  2008.3 

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    Event date： 2008.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Electrical spin injection and detection by ballistic transport in MnAs / GaAs / GaAs : MnAs spin-valve hybrid heterostructures International conference

    P. N. Hai, Y. Sakata, M. Yokoyama, S. Ohya, M. Tanaka

    2008 APS Annual March Meeting  2008.3 

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    Event date： 2008.3

    Language：English   Presentation type：Poster presentation  

    Venue：New Orleans, Louisiana  

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  • Huge tunneling magnetoresistance (>18300%) in semiconductor based magnetic tunnel junctions with zinc-blende MnAs nanoparticles International conference

    P. N. Hai, B.H. Yu, S. Ohya, M. Tanaka

    2008 APS Annual March Meeting  2008.3 

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    Event date： 2008.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：New Orleans, Louisiana  

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  • Spin valve effect by ballistic transport in ferromagnetic metal (MnAs) / semiconductor (GaAs) hybrid heterostructures International conference

    Pham Nam Hai, Yusuke Sakata, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    U. Tokyo GCOE [Secure Life Electronics] International Symposium  2008.3 

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    Event date： 2008.3

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo  

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  • 閃亜鉛鉱型MnAs微粒子を含む半導体ナノ構造における巨大な磁気抵抗効果(～100,000%)

    ファム ナム ハイ, ユ ビョンホ, 大矢 忍, 田中雅明

    平成19～22年文部科学省科学研究費補助金 特定領域研究「スピン流の創出と制御」研究成果報告会  2008.2 

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    Event date： 2008.2

    Language：Japanese   Presentation type：Poster presentation  

    Venue：東京  

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  • Huge tunneling magnetoresistance in semiconductor based magnetic tunnel junctions with zinc-blende MnAs nanoparticles

    Pham Nam Hai, ByungHo Yu, Shinobu Ohya, Masaaki Tanaka

    2007.12 

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    Event date： 2007.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Spin injection and detection by ballistic transport in ferromagnet (MnAs) / semiconductor (GaAs) spin-valve structures

    Pham Nam Hai, 坂田祐輔, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    2007.10 

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    Event date： 2007.10

    Language：Japanese   Presentation type：Poster presentation  

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  • 磁性金属(MnAs)/半導体(GaAs)スピンバルブ構造におけるバリスティック伝導によるスピン注入・検出

    ファム ナム ハイ, 坂田祐輔, 横山正史, 大矢忍, 田中雅明

    第31回日本応用磁気学会学術講演会  2007.9 

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    Event date： 2007.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 強磁性MnAs微粒子を含む半導体ヘテロ構造におけるメモリ効果

    ファム ナム ハイ, 横山 正史, 大矢 忍, 田中 雅明

    平成19年秋季第68回応用物理学会関連連合講演会  2007.9 

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    Event date： 2007.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道  

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  • (招待講演) Ⅲ－Ｖ族強磁性半導体へテロ構造におけるトンネル磁気抵抗効果と共鳴トンネル効果 Invited

    大矢忍, ファム ナム ハイ, 水野洋輔, 田中雅明

    2007年（平成19年）秋季第68回応用物理学会学術講演会講演論文集  2007.9 

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    Event date： 2007.9

    Language：Japanese  

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  • 強磁性半導体GaMnAs量子井戸二重障壁ヘテロ接合におけるトンネル磁気抵抗効果と共鳴トンネル効果

    大矢 忍, ファム ナム ハイ, 水野 洋輔, 田中 雅明

    第31回日本応用磁気学会学術講演会講演論文集  2007.9 

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    Event date： 2007.9

    Language：Japanese  

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  • Spin-dependent resonant tunneling effect in ferromagnetic-semiconductor quantum heterostructures International conference

    S. Ohya, P. N. Hai, Y. Mizuno, M. Tanaka

    The 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS15)  2007.7 

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    Event date： 2007.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo, Japan  

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  • Electrical spin injection and detection by ballistic transport in MnAs / GaAs / GaAs : MnAs spin-valve hybrid structures International conference

    P. N. Hai, Y. Sakata, M. Yokoyama, S. Ohya, M. Tanaka

    The 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS15)  2007.7 

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    Event date： 2007.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo, Japan  

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  • Spin-Dependent Transport Properties in GaMnAs-based Spin Hot-Carrier Transistors International conference

    Y. Mizuno, S. Ohya, P. N. Hai, M. Tanaka

    The 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS15)  2007.7 

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    Event date： 2007.7

    Language：English   Presentation type：Poster presentation  

    Venue：Tokyo, Japan  

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  • Tunneling Magnetoresistance and Colossal Electro-Resistance in Magnetic Tunnel Junctions with Ferromagnetic MnAs Nanoclusters International conference

    P. N. Hai, M. Yokoyama, S. Ohya, M. Tanaka

    The fourth international school and conference on spintronics and quantum information technology (Spintech IV)  2007.6 

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    Event date： 2007.6

    Language：English   Presentation type：Poster presentation  

    Venue：Maui, Hawaii  

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  • Electrical Spin Injection and Detection by Ballistic Transport in MnAs / GaAs / GaAs:MnAs Spin–Valve Heterostructures International conference

    P. N. Hai, Y. Sakata, M. Yokoyama, S. Ohya, M. Tanaka

    The fourth international school and conference on spintronics and quantum information technology (Spintech IV)  2007.6 

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    Event date： 2007.6

    Language：English   Presentation type：Poster presentation  

    Venue：Maui, Hawaii  

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  • Spin-Dependent Resonant Tunneling Effect in GaMnAs Quantum-Well Double-Barrier Hetero-structures International conference

    S. Ohya, P. N. Hai, Y. Mizuno, M. Tanaka

    The fourth international school and conference on spintronics and quantum information technology (Spintech IV)  2007.6 

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    Event date： 2007.6

    Language：English   Presentation type：Poster presentation  

    Venue：Maui, Hawaii  

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  • Semiconductor Spin Hot-Carrier Transistor with Amplification Capability International conference

    Y. Mizuno, S. Ohya, P. N. Hai, M. Tanaka

    The fourth international school and conference on spintronics and quantum information technology (Spintech IV)  2007.6 

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    Event date： 2007.6

    Language：English   Presentation type：Poster presentation  

    Venue：Maui, Hawaii  

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  • GaMnAsを用いた磁気トンネルトランジスタにおけるスピン依存伝導特性

    水野洋輔, 大矢 忍, ファム ナム ハイ, 田中雅明

    平成19年春季第54回応用物理学会関連連合講演会  2007.3 

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    Event date： 2007.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • MnAs/GaAs/GaAs:MnAsスピンバルブ構造におけるバリスティック伝導によるスピン注入・検出

    ファム ナム ハイ, 坂田祐輔, 横山正史, 大矢忍, 田中雅明

    平成19年春季第54回応用物理学会関連連合講演会  2007.3 

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    Event date： 2007.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 非相反損失による導波路光アイソレータの低損失化および単一モード伝搬の確認

    雨宮智宏, 清水大雅, 横山正史, ファム ナム ハイ, 田中雅明, 中野義昭

    平成19年春季第54回応用物理学会関連連合講演会  2007.3 

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    Event date： 2007.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • Spin-dependent tunneling properties in GaMnAs based magnetic tunnel transistors International conference

    Y. Mizuno, S. Ohya, P. N. Hai, M. Tanaka

    2007 APS Annual March Meeting  2007.3 

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    Event date： 2007.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Denver, Colorado  

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  • Resonant tunneling effect and tunneling magnetoresistance in ferromagnetic semiconductor quantum heterostructures International conference

    S. Ohya, P. N. Hai, Y. Mizuno, M. Tanaka

    2007 APS Annual March Meeting  2007.3 

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    Event date： 2007.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Denver, Colorado  

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  • Tunneling magnetoresistance and colossal electro-resistance in semiconductor heterostructure with ferromagnetic MnAs nanoclusters International conference

    P. N. Hai, M. Yokoyama, S. Ohya, M. Tanaka

    10th Joint MMM/Intermag Conference  2007.1 

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    Event date： 2007.1

    Language：English   Presentation type：Poster presentation  

    Venue：Baltimore, Maryland  

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  • Single mode operation of 1.5 mu m TM-mode waveguide optical isolators based on the nonreciprocal-loss phenomenon

    T. Amemiya, H. Shimizu, M. Yokoyama, P. N. Hai, M. Tanaka, Y. Nakano

    2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007), VOLS 1-5  2007 

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    Event date： 2007

    Language：English  

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  • Spin injection and detection by ballistic transport in MnAs / GaAs / GaAs:MnAs spin–valve heterostructures

    P. N. Hai, Y. Sakata, M. Yokoyama, S. Ohya, M. Tanaka

    The 11 Symposium on the Physics and Application of Spin-Related Phenonmena in Semiconductors; PASPS-11  2006.11 

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    Event date： 2006.12

    Language：English   Presentation type：Poster presentation  

    Venue：東京  

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  • Tunneling magnetoresistance and the quantum-size effect in GaMnAs quantum-well heterostructures International conference

    Shinobu Ohya, Pham Nam Hai, Yosuke Mizuno, Masaaki Tanaka

    14th International Conference on Molecular Beam Epitaxy  2006.9 

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    Event date： 2006.9

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Tokyo  

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  • 強磁性MnAs による非相反損失を用いた導波路型光アイソレータのゼロ磁場動作

    雨宮智宏, 清水大雅, ファム ナム ハイ, 田中雅明, 中野義昭

    平成18年秋季第65回応用物理学会関連連合講演会  2006.9 

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    Event date： 2006.8 - 2006.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：立命館大学  

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  • MnAs薄膜 / GaAs / AlAs / MnAs微粒子からなる磁気トンネル接合におけるTMRのAlAs障壁膜厚依存性

    ファム ナム ハイ, 横山正史, 大矢忍, 田中雅明

    平成18年秋季第65回応用物理学会関連連合講演会  2006.8 

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    Event date： 2006.8 - 2006.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：立命館大学  

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  • 強磁性MnAsによる非相反損失を用いた導波路型光アイソレータのゼロ磁場動作

    AMEMIYA TOMOHIRO, SHIMIZU HIROMASA, HAI P. N, TANAKA MASAAKI, NAKANO YOSHIAKI

    応用物理学会学術講演会講演予稿集  2006.8 

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    Event date： 2006.8

    Language：Japanese  

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  • Spin injection and detection by ferromagnetic MnAs nanoclusters embedded in III-V semiconductor heterostructures International conference

    Pham Nam Hai, Masafumi Yokoyama, Shinobu Ohya, Masaaki Tanaka

    The 4th International Conference on Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS4)  2006.8 

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    Event date： 2006.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sendai, Miyaghi  

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  • Optical waveguide isolator based on nonreciprocal loss shift induced by ferromagnetic MnAs International conference

    T. Amemiya, H. Shimizu, P. N. Hai, M. Yokoyama, M. Tanaka, Y. Nakano

    The 17th International Conference on Magnetism (ICM2006)  2006.8 

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    Event date： 2006.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Kyoto  

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  • Spin-dependent tunneling and magnetic properties of ferromagnetic MnAs nanoclusters International conference

    P. N. Hai, K. Takahashi, M. Yokoyama, S.Ohya, M. Tanaka

    The 17th International Conference on Magnetism (ICM2006)  2006.8 

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    Event date： 2006.8

    Language：English   Presentation type：Poster presentation  

    Venue：Kyoto  

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  • Quantum-size effect and tunneling magnetoresistance in GaMnAs quantum-well heterostructures International conference

    Shinobu Ohya, Pham Nam Hai, Yosuke Mizuno, Masaaki Tanaka

    The 4th International Conference on Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS4)  2006.8 

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    Event date： 2006.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Sendai, Miyagi  

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  • TM-mode Semiconductor Active Waveguide Optical Isolators based on the Nonreciprocal Loss induced by epitaxially grown ferromagnetic MnAs

    T. Amemiya, H. Shimizu, P. N. Hai, M. Tanaka, Y. Nakano

    25th Electronic Materials Symposium(EMS 25)  2006.7 

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    Event date： 2006.7

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Izunokuni, Shizuoka  

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  • トンネル磁気抵抗効果による強磁性MnAs微粒子の磁気特性の研究

    ファム ナム ハイ, 高橋啓介, 横山正史, 大矢忍, 田中雅明

    平成18年春季第55回応用物理学会関連連合講演会  2006.3 

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    Event date： 2006.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • III-V族ベース・エピタキシャル強磁性トンネル接合とトンネル磁気抵抗効果

    田中雅明, ファム ナム ハイ, 横山正史, 大矢忍, 菅原聡

    文部科学省 RR2002 ITプログラム｢高機能・超低消費電力メモリの開発｣プロジェクト 平成17年度成果報告会  2006.3 

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    Event date： 2006.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：仙台、宮城県  

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  • エピタキシャル強磁性電極MnAsを用いた非相反損失変化による導波路型光アイソレータ

    雨宮智宏, 清水大雅, ファム ナム ハイ, 横山正史, 田中雅明, 中野義昭

    平成18年春季第55回応用物理学会関連連合講演会  2006.3 

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    Event date： 2006.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京  

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  • 半導体スピントロニクス・ヘテロ構造電子デバイスの研究

    田中 雅明, 周藤 悠介, 矢田 慎介, 杉浦 邦晃, ファム ナム ハイ, 横山 正史, 大矢 忍, 中根 了昌, 菅原 聡

    文部科学省科学研究費補助金特定領域研究「半導体ナノスピントロニクス」平成17年度成果報告会  2006.1 

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    Event date： 2006.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • TM mode optical waveguide isolator with 8.8 dB/mm nonreciprocal propagation induced by ferromagnetic MnAs

    T. Amemiya, H. Shimizu, Y. Nakano, P. N. Hai, M. Yokoyama, M. Tanaka

    2006 OPTICAL FIBER COMMUNICATION CONFERENCE/NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, VOLS 1-6  2006 

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    Event date： 2006

    Language：English  

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  • TM mode optical wave guide isolator with 8.8 db/mm nonreciprocal propagation induced by ferromagnetic MnAs International conference

    T. Amemiya, H. Shimizu, P. N. Hai, M. Yokoyama, M. Tanaka, Y. Nakano

    Optical Fiber Communication Conference, 2006 and the 2006 National Fiber Optic Engineers Conference (OFC/NFOEC-2006)  2006 

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    Language：English   Presentation type：Oral presentation (general)  

    Venue：Anaheim, USA  

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  • Tunneling magnetoresistance in GaMnAs-based double-barrier heterostructures International conference

    Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    The Second Asian Forum on Magnetics  2005.12 

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    Event date： 2005.12

    Language：English   Presentation type：Oral presentation (general)  

    Venue：YoungPyeong  

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  • Spin-dependent Tunneling Transport in III-V-based Magnetic Heterostructures International conference

    Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    Joint Workshop on Magnetics  2005.12 

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    Event date： 2005.12

    Language：English   Presentation type：Oral presentation (general)  

    Venue：YoungPyeong  

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  • GaMnAsのXMCDの磁場・温度・濃度依存性

    竹田幸治, 岡本淳, 岡根哲夫, 藤森伸一, 斎藤祐児, 村松康司, 藤森 淳, 岡林潤, 尾嶋正治, 大矢忍, Pham Nam Hai, 田中雅明

    日本物理学会2005年秋季大会  2005.9 

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    Event date： 2005.9

    Language：Japanese  

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  • 単電子スピントランジスタを用いた再構成可能な論理回路(II)

    ファム ナム ハイ, 菅原聡, 田中雅明

    平成17年秋季第66回応用物理学会関連連合講演会  2005.9 

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    Event date： 2005.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • CS-8-10 Integratable Waveguide Optical Isolators Based on the Nonreciprocal Loss Shift

    Shimizu Hiromasa, Amemiya Tomohiro, Hai Pham Nam, Yokoyama Masafumi, Tanaka Masaaki, Nakano Yoshiaki

    Proceedings of the Society Conference of IEICE  2005.9  The Institute of Electronics, Information and Communication Engineers

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    Event date： 2005.9

    Language：Japanese  

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  • エピタキシャル強磁性金属MnAsを電極に用いたTMモード非相反損失導波路型光アイソレータの実証

    雨宮智宏, 清水大雅, ファム ナム ハイ, 横山正史, 田中雅明, 中野義昭

    日本応用磁気学会第29回学術講演会  2005.9 

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    Event date： 2005.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：長野県  

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  • Reconfigurable logic gates based on single electron spin transistors International conference

    Pham Nam Hai, Satoshi Sugahara, Masaaki Tanaka

    The third international school and conference on spintronics and quantum information technology (Spintech III)  2005.8 

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    Event date： 2005.8

    Language：English   Presentation type：Poster presentation  

    Venue：Hyogo  

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  • Spin polarized tunneling in III-V based heterostructures with a ferromagnetic MnAs thin film and GaAs:MnAs nanoclusters International conference

    Pham Nam Hai, Masafumi Yokoyama, Masaaki Tanaka

    12th International Conference on modulated semiconductor structures (MSS12)  2005.7 

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    Event date： 2005.7

    Language：English   Presentation type：Poster presentation  

    Venue：Albuquerque, New Mexico  

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  • 半導体スピントロニクス・ヘテロ構造電子デバイスの研究

    田中 雅明, ファム ナム ハイ, 横山 正史, 周藤 悠介, アーサンナズムル, 大矢 忍, 菅原 聡

    文部科学省科学研究費補助金特定領域研究「半導体ナノスピントロニクス」平成17年度 「夏の研究会」  2005.6 

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    Event date： 2005.6

    Language：Japanese  

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  • GaAs:MnAs ナノクラスター/AlAs/GaAs/MnAs ヘテロ構造におけるトンネル磁気抵抗効果

    ファム ナム ハイ, 菅原聡, 田中雅明

    平成１７年春季第52回応用物理学会関連連合講演会  2005.3 

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    Event date： 2005.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 強磁性半導体GaMnAsを用いたGaMnAs/AlAs/InGaAs/AlAs/GaMnAs二重障壁構造におけるトンネル磁気抵抗効果

    大矢忍, ファム ナム ハイ, 田中雅明

    マグネティックス研究会  2005.3 

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    Event date： 2005.3

    Language：Japanese  

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  • 24aPS-24 Magnetic field dependence of XMCD of GaMnAs II

    Takeda Yukiharu, Okamoto Jun, Okane Tetsuo, Fujimori Shin-ichi, Saitoh Yuji, Muramatu Yasuji, Fujimori Atushi, Okabayashi Jun, Oshima Masaharu, Oya Shinobu, Pham Nam Hai, Tanaka Masaaki

    Meeting abstracts of the Physical Society of Japan  2005.3  The Physical Society of Japan (JPS)

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    Event date： 2005.3

    Language：Japanese  

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  • Tunneling magnetoresistance in GaMnAs/AlAs/InGaAs/AlAs/GaMnAs double-barrier magnetic tunnel junctions International conference

    Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    The 13th International MBE conference  2004.8 

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    Event date： 2004.8

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Edinburgh  

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  • Spin-Dependent Tunneling in III-V-based Ferromagnetic-Semiconductor Double-Barrier Heterostructures International conference

    Shinobu Ohya, Pham Nam Hai, Masaaki Tanaka

    The 3rd International Conference on Physics and Application of Spin Related Phenomena in Semiconductors  2004.7 

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    Event date： 2004.7

    Language：English   Presentation type：Poster presentation  

    Venue：Santa Barbara, California  

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  • InGaAs量子井戸を有する強磁性半導体GaMnAs二重障壁トンネル接合

    大矢忍, ファム ナム ハイ, 大下淳一, 田中雅明

    平成16年春季第51回応用物理学会関連連合講演会  2004.3 

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    Event date： 2004.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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Industrial property rights

  • 磁気センサ

    PHAMNAM HAI, 白倉孝典, 近藤 剛

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    Applicant：国立大学法人東京科学大学, キオクシア株式会社

    Application no：特願2024-195845  Date applied：2024.11

    Announcement no：特開2025-013618  Date announced：2025.1

    Patent/Registration no：特許7838768  Date registered：2026.3 

    Rights holder：国立大学法人東京科学大学, キオクシア株式会社

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  • スピン軌道トルク層とハイブリッドした非局在スピンバルブ読み取りセンサ

    PHAMNAM HAI, クアン レイ, リウ シャオユン, ブライアン アール ヨーク, チャーニー ファン, ソン ティー レイ, 高野 公史, トゥオ ファン, ハッサン オスマン

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    Applicant：国立大学法人東京科学大学, Western Digital Technologies, Inc.

    Application no：特願2024-097247  Date applied：2024.6

    Announcement no：特開2025-003937  Date announced：2025.1

    Rights holder：国立大学法人東京科学大学, Western Digital Technologies, Inc.

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  • スピン軌道－スピン軌道ロジック

    PHAMNAM HAI, クアン レイ, リウ シャオユン, ブライアン アール ヨーク, チャーニー ファン, 高野 公史

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    Applicant：国立大学法人東京科学大学, Western Digital Technologies, Inc.

    Application no：特願2024-097248  Date applied：2024.6

    Announcement no：特開2025-003938  Date announced：2025.1

    Rights holder：国立大学法人東京科学大学, Western Digital Technologies, Inc.

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  • トポロジカル絶縁体材料による局所的および非局所的スピン軌道トルク（ＳＯＴ）書き込みヘッド

    PHAMNAM HAI, クアン レイ, リウ シャオユン, ブライアン アール ヨーク, チャーニー ファン, 高野 公史, ハッサン オスマン, ソン ティー レイ, シャロン バイン, 前田 麻貴, トゥオ ファン, ユ タオ

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    Applicant：国立大学法人東京科学大学, Western Digital Technologies, Inc.

    Application no：特願2024-096188  Date applied：2024.6

    Announcement no：特開2025-003936  Date announced：2025.1

    Rights holder：国立大学法人東京科学大学, Western Digital Technologies, Inc.

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  • 磁気メモリ及びその製造方法

    PHAMNAM HAI, グエン フィン ズィ カン, 白倉孝典

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    Applicant：国立大学法人東京工業大学.

    Application no：特願PCT/JP2024/014471  Date applied：2024.4

    Publication no：WO2024/214719  Date published：2024.10

    Rights holder：国立大学法人東京科学大学

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  • 磁性細線媒体、磁壁駆動型メモリ、磁壁駆動型空間光変調器および磁性細線媒体の製造方法

    PHAMNAM HAI, ゲィン フン ユィ カン, 高橋 真央, 井口 義則, 宮本 泰敬, 加藤 大典, 小倉 渓, 中谷 真規

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    Applicant：国立大学法人東京工業大学, 日本放送協会

    Application no：特願2022-115835  Date applied：2022.7

    Announcement no：特開2024-013615  Date announced：2024.2

    Rights holder：国立大学法人東京工業大学, 日本放送協会

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  • ＳＯＴ（スピン軌道トルク）ＭＴＪ（磁気トンネル接合）デバイス、ＭＡＭＲ（マイクロ波アシスト磁気記録）書き込みヘッド、ＭＲＡＭ（磁気抵抗ランダムアクセスメモリ）デバイス

    PHAMNAM HAI, クアン レイ, チャーニー ファン, ブライアン アール ヨーク, タオ エー グエン, ジェン ガオ, クオック サン ホ

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    Applicant：国立大学法人東京科学大学, Western Digital Technologies, Inc.

    Application no：特願2020-212229  Date applied：2021.9

    Announcement no：特開2021-128814 

    Patent/Registration no：特許7731546  Date registered：2025.8 

    Rights holder：国立大学法人東京科学大学, Western Digital Technologies, Inc.

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  • スピン注入源、磁気メモリ、スピンホール発振器、及び計算機

    PHAMNAM HAI, 白倉孝典, 近藤 剛

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    Applicant：国立大学法人東京工業大学, キオクシア株式会社

    Application no：特願2021-141316  Date applied：2021.3

    Announcement no：特開2023-034867 

    Patent/Registration no：特許7614589  Date registered：2025.1 

    Rights holder：国立大学法人東京工業大学,キオクシア株式会社

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  • スピンホール発振器および磁気記録デバイス、計算機.

    PHAMNAM HAI, 白倉孝典

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    Applicant：国立大学法人東京工業大学

    Application no：特願2021-503967  Date applied：2020.2

    Publication no：WOWO 2020/179493  Date published：2020.9

    Patent/Registration no：特許第7493249号  Date registered：2024.5 

    Rights holder：国立大学法人東京工業大学

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Awards

  • Excellent Research Award

    2020   The Magnetics Society of Japan  

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  • German Innovation Award “Gottfried Wagener Prize 2019”

    2019   German Chamber of Commerce and Industry in Japan  

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  • Marubun Research Encouragement Award

    2017   Marubun Reseach Promotion Foundation  

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  • Ando Memorial Academic Award

    2013   The foundation of Ando Laboratory  

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  • SSDM Young Researcher Award

    2009   International Conference on Solid State Devices and Materials   Huge Magnetoresistance Effect in Semiconductor based Nanostructures with Zinc-blende MnAs Nanoparticles

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  • President Special Award

    2009   University of Tokyo   Spin dependent transport phenomena in III-V semiconductor heterostructures with ferromagnetic MnAs nano-scale particles

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  • Dean of School of Engineering Award (Best research Award)

    2009   University of Tokyo   Spin dependent transport phenomena in III-V semiconductor heterostructures with ferromagnetic MnAs nano-scale particles

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  • 第20回 独創性を拓く先端技術大賞 最優秀賞 (文部科学大臣賞)

    2006   Sankei  

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  • Dean of School of Engineering Award (Research)

    2006   University of Tokyo  

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  • EE Department Excellent Master Thesis Award

    2006   University of Tokyo  

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  • Inose Academic Research Encouragement Award

    2005   電気電子情報学術振興財団  

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  • EE Department Excellent Bachelor Thesis Award

    2004   University of Tokyo  

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Research Projects

  • トポロジカル絶縁体を用いる超低消費電力磁気抵抗メモリの創製

    Grant number：20F20050  2020.4 - 2022.3

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    PHAM NAM・HAI, NGUYEN KHANG

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    Grant amount：\2300000 （ Direct Cost: \2300000 ）

    本研究では、スピンホール効果が極めて強いかつ高い電気伝導率を両立できるトポロジカル絶縁体をスピン注入源として使用し、超低電流密度かつ超高速な書き込みができるSOT-MRAMを実証する。トポロジカル絶縁体の巨大なスピンホール効果による磁化反転を実現できれば、MRAMの書き込み電力2桁、書き込み速度1桁、ビット密度1桁が向上でき、従来の揮発性メモリであるSRAMやDRAMを置き換えると期待できる。我々は2021年度の研究では、次の成果を達成した。
    1.Si/SiOx基板上にスパッタリング製膜したトポロジカル絶縁体BiSb/Pt/Co/Pt垂直磁化膜を作製し、BiSbの大きなスピンホール角(2.4)および比較的に高い電気伝導率(1.0ｘ10E5 Ohm-1m-1)を実証した。発表論文：Appl. Phys. Lett. 119, 082403, (2021)
    2.サファイア基板上にスパッタリング製膜したトポロジカル絶縁体BiSb/(Co/Pt)垂直磁化膜を作製し、BiSbの巨大なスピンホール角(10.7)および高い電気伝導率(1.8ｘ10E5 Ohm-1m-1)を達成した。発表論文：Sci. Rep. 12, 2998 (2022)
    3.Si/SiOx基板上にスパッタリング製膜したトポロジカル絶縁体BiSb/(Co/Pt)垂直磁化膜の800 nmサイズの素子を作製し、BiSbによる超高速(1 ns)および超低消費電力(従来より一桁小さい電流密度)の磁反転に成功した。発表論文：Appl. Phys. Lett. 120, 152401 (2022)

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  • Breaking the performance limit of spin transistors by using quantum transport

    Grant number：18H01492  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Pham Nam Hai

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    Grant amount：\17420000 （ Direct Cost: \13400000 、 Indirect Cost：\4020000 ）

    In this work, we aimed to solve the conductivity mismatch problem at the interface of ferromagnetic metal / semiconductor by utilizing ballistic transport in nanoscale semiconductor channel. We fabricated nanoscale Si-based spin valve devices with Fe/(Mg)/MgO/Ge spin injector/detector and 20 nm-long Si channel, and achieved a large spin-valve ratio of -3.6% and large spin-dependent output voltage of 25 mV. We then fabricated fully epitaxial MnGa/GaAs/MnGa III-V semiconductor-based nanoscale spin valve devices, and achieved a world-record spin valve ratio of 12% and spin-dependent output voltage of 33 mV. Our results demonstrate that ballistic transport in nanoscale semiconductor is very promising for realization of high performance spin transistors.

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  • トポロジカル表面状態を用いるスピン軌道トルク磁気メモリの創製

    Grant number：18071127  2018 - 2023

    科学技術振興機構  戦略的な研究開発の推進/戦略的創造研究推進事業/CREST

    PHAM NAM・HAI

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    本研究では、産業連携を前提とし、トポロジカル材料を磁気メモリへ応用する研究開発を行います。そのために、分子線エピキタシー法に加えて、量産性に優れたスパッター法によるBiSbの製膜技術および垂直磁気異方性を示す磁性体との接合の作製技術を確立すること、超高速、超低消費電力のスピン軌道トルク磁化反転を実証すること、磁性細線におけるカイラル磁壁・スキルミオンの発生、駆動、検出の基盤技術を実証します。

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  • Research of pure spin current source using tunable topological insulator

    Grant number：16K14228  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    PHAM NAM HAI

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    Grant amount：\3770000 （ Direct Cost: \2900000 、 Indirect Cost：\870000 ）

    In this research, we developed a high-performance pure spin current source using BiSb topological insulator thin films for the next generation spin-orbit torque (SOT) MRAM. We developed growth techniques for high quality BiSb thin films with both high electrical conductivity and high spin Hall angle. We found that BiSb(012) thin films have a giant spin Hall angle of 52 at room temperature. We further demonstrated current-induced magnetization switching of a MnGa ferromagnetic thin film with a current density as low as 1.5 MA/square cm. This value is one to two orders of magnitudes lower than those of heavy metal/MnGa bilayers. Furthermore, the spin Hall conductivity of BiSb is 30 times higher than that of Pt, and 100 times higher than that of other topological insulators, such as Bi2Se3. Our results show that BiSb is very promising for SOT-MRAM.

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  • Spin-functional materials and devices using narrow-gap ferromagnetic semiconductors

    Grant number：16K14224  2016.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Tanaka Masaaki, Le Duc Anh, Nguyen Thanh Tu, Pham Nam Hai

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    Grant amount：\3770000 （ Direct Cost: \2900000 、 Indirect Cost：\870000 ）

    We have successfully grown a new class of narrow-gap III-V based ferromagnetic semiconductors with zinc-blende crystal structures and their heterostructures. We have revealed their properties and functionalities, which can be applied to spintronics devices. Ferromagnetic semiconductors (FMS) are alloy semiconductors doped with magnetic atoms and have both the properties of semiconductors and ferromagnets, thus expected to be functional materials for next-generation electronics. We have created p-type (Ga,Fe)Sb and n-type (In,Fe)Sb whose Curie temperatures are higher than room temperature, and their quantum heterostructures. These new materials and heterostructures are shown to have unique and useful properties, which can be applied to future spintronics devices.

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  • 強磁性半導体超薄膜におけるスピン依存熱電効果

    Grant number：15F15357  2015.11 - 2018.3

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    PHAM NAM・HAI, BUI CONG TINH

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    Grant amount：\2300000 （ Direct Cost: \2300000 ）

    近年に磁性材料と半導体材料の特長を融合できる新材料として強磁性半導体は大変注目されている。強磁性半導体においては、通常の半導体と異なり、スピンに依存する様々な熱電効果存在する。強磁性半導体におけるスピン依存熱電効果を利用すれば、従来の半導体よりも性能が格段に高い熱電材料が開発でき、高性能な熱電素子に応用できると期待されている。
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    そこで、本研究では、常温でも強磁性が発現できる(InFe)Sb鉄系強磁性半導体薄膜を対象にスピン依存熱電効価の評価を行った。MBE法で製膜した(InFe)Sb薄膜に対して、面内スピン依存熱電効果の評価を行った。その結果、熱電の横方向電圧が面内磁化に対して、偶関数の振る舞いを示したことを観測した。また、熱電の横方向電圧の磁化方向の角度依存性および温度依存性を系統的に調べた。その結果、(InFe)Sbの薄膜の面内スピン依存熱電効果がプラナーネルンスト効果によって発生することを確認した。
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    観測したプラナーネルンスト効果を理論的に解析するために、面内スピン依存熱伝導と面内スピン依存電気伝導現象の間にモット関係が成り立つことを仮定し、横方向熱電係数Sxyとプレナーホール抵抗率ρxyの関係を定式化した。この関係が成り立つことを証明するために、同じ(InFe)Sbの薄膜に対して、プラナーホール効果の磁化依存性および温度依存性も測定した。得られた横方向熱電係数Sxyとプレナーホール抵抗率ρxyをモット関係から導出した式で定量的に説明可能であることを明らかにした。これにより、面内スピン依存熱伝導と面内スピン依存電気伝導現象の間にモット関係が成り立つことを世界で初めて成功した。以上の研究成果が鉄系強磁性半導体のスピン依存熱電現象の評価技術や初期なデータとして貴重であり、今後の鉄系強磁性半導体のスピン依存熱電デバイスに貢献できる。

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  • Research on semiconductor spin devices with ferromagnetic semiconductors

    Grant number：15H03988  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    PHAM NAM HAI

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    Grant amount：\16900000 （ Direct Cost: \13000000 、 Indirect Cost：\3900000 ）

    In this research, we successfully developed a new Fe-doped p-type ferromagnetic semiconductor (Ga,Fe)Sb and a new n-type ferromagnetic semiconductor (In,Fe)Sb, which are necessary for fabrication of semiconductor spin devices. Furthermore, we demonstrated intrinsic ferromagnetism in both materials at room-temperature. Using Fe-doped ferromagnetic semiconductors, we fabricated spin diodes and spin transistors, and investigated their spin-dependent transport characteristics. In an Esaki spin-diode structure of n-(In,Fe)As/p-InAs, we observed the spin-split conduction band of (In,Fe)As for the first time by using the tunneling spectroscopy method. We also fabricated field-effect transistors with an (In,Fe)As quantum well, and electrically control the Curie temperature of the (In,Fe)As quantum well using the wave function engineering method. Our results provide an approach for versatile, low power, and ultrafast manipulation of magnetization.

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  • Fe-based carrier-induced ferromagnetic semiconductors and their applications to next-generation spin devices

    Grant number：24686040  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (A)

    PHAM NAM HAI

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    Grant amount：\27040000 （ Direct Cost: \20800000 、 Indirect Cost：\6240000 ）

    In this research, we aimed at fabrication of new Fe-based ferromagnetic semiconductors and development of new spin-devices utilizing them. The major results are as follows. First, we successfully fabricated (1) the world’s first n-type electron-induced ferromagnetic semiconductor (In,Fe)As. We observed (2) the quantum-size effect in quantum wells with ultrathin (In,Fe)As layers. We successfully controlled ferromagnetism by controlling the overlapping between Fe atoms and electron wavefunctions in spin-transistor structures with (In,Fe)As quantum wells for the first time. We then fabricated (3) a new p-type ferromagnetic semiconductor (Ga,Fe)Sb, and improved the Curie temperature of this material up to 230 K, which is the highest value ever reported for intrinsic ferromagnetic semiconductors. Our results indicate that Fe-based ferromagnetic semiconductors are very promising materials for semiconductor spintronics.

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  • Semiconductor Materials and Devices with Nonvolatile and Reconfigurable Functions

    Grant number：23000010  2011 - 2015

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Specially Promoted Research

    TANAKA Masaaki, OHYA Shinobu, NAKANE Ryosho, Pham Nam Hai, PALMSTROM Chris

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    Grant amount：\539110000 （ Direct Cost: \414700000 、 Indirect Cost：\124410000 ）

    By introducing magnetic atoms and materials into semiconductor materials and devices, we have successfully created new ferromagnetic semiconductors and ferromagnet/semiconductor hybrid structures to utilize not only charge transport of carriers but also spin degrees of freedom, and have realized a variety of new functionalities. Using these materials, we have designed and fabricated new semiconductor spintronics devices, in particular spin transistors, with spin-related functions, and have proved their device operation principles. Our results pave the way to the applications to non-volatile memory and reconfigurable logic circuitry.

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  • 磁性体/半導体ハイブリッドナノ構造におけるスピン関連現象とデバイス応用

    Grant number：23241044  2011

    日本学術振興会  科学研究費助成事業  基盤研究(A)

    田中 雅明, 大矢 忍, 中根 了昌, ファムナム ハイ

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    Grant amount：\16770000 （ Direct Cost: \12900000 、 Indirect Cost：\3870000 ）

    「磁性体/半導体ハイブリッドナノ構造におけるスピン関連現象とデバイス応用」を目的とした研究を開始した。ここで「磁性体/半導体ハイブリッドナノ構造」として対象とする材料系は、(a)GaMnAsやInGaMnAsを含む強磁性半導体ヘテロ構造、(b)MnAsナノ微粒子を埋め込んだGaAsとそのヘテロ構造、(c)強磁性金属薄膜/半導体ヘテロ構造である。これらの磁性体/半導体ハイブリッドナノ構造において、(1)エピタキシャル成長と形成技術の確立、(2)スピン依存伝導の理解と制御、磁気抵抗効果の増大、高温動作化、(3)スピン依存伝導デバイス(2端子素子、3端子素子)の試作、動作原理の確立を目指し、材料科学、物性の理解と制御からデバイス応用まで系統的に研究を行うことを目指している。
    平成23年度には、磁性体/半導体ハイブリッドナノ構造(上記(a)(b)(c))のエピタキシャル成長と形成技術を確立しつつある。スピン依存伝導の理解と制御を行うため、まず2端子デバイスとして、強磁性半導体ヘテロ構造からなる強磁性トンネル接合素子、および強磁性ナノ微粒子を含む強磁性トンネル接合素子を作製し、そのスピン依存トンネル伝導の実験を行った。共鳴トンネル効果による磁気抵抗効果の増大、共鳴トンネル分光によるGaMnAsのバンド構造とフェルミ準位の解明を行った。その結果、どのような電気的・磁気的性質をもつGaMnAsにおいてもフェルミ準位は価電子帯から数十meV程度上の禁制帯中に存在し、不純物バンドによる伝導が支配的であることを明らかにした。平成23年6月以降は特別推進研究に移行して、より幅広い研究を行っている。

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  • Spin motive-force device with zinc-blende MnAs nanoparticles

    Grant number：22760225  2010 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    PHAM Nam hai

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    Grant amount：\4160000 （ Direct Cost: \3200000 、 Indirect Cost：\960000 ）

    We aimed at the development of fabrication technology of homogeneous ferromagnetic MnAs nanoparticles embedded in a GaAs matrix for semiconductor spintronic applications. We successfully developed(1) the spinodal decomposition technique using the phase decomposition diagram for fabrication of homogenous MnAs nanoparticles. Using this technique, we successfully fabricated(2) single electron transistors with strong spin accumulation and long spin relaxation time, and(3) double barrier tunnel junctions with zinc-blended MnAs nanoparticles and non-magnetic electrodes with magnetoresistance enhanced by in-elastic co-tunneling.

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  • Reconfigurable Nano-Spin Devices

    Grant number：18106007  2006 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

    TANAKA MASAAKI, OHYA Shinobu, SUGAHARA Satoshi, NAKANE Ryosho

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    Grant amount：\101270000 （ Direct Cost: \77900000 、 Indirect Cost：\23370000 ）

    We aimed at the development of basic technologies for reconfigurable nano-scale spin devices that cannot be realized by the conventional semiconductor device technology. We proposed new semiconductor-based device structures with spin-degrees of freedom, and fabricate the reconfigurable devices (in which the device functions can be reprogrammed after fabricating the devices), and demonstrated the device operation principles. We studied the following three types of spin devices.
    (1) Group-IV-semiconductor based MOSFET planer-type spin devices
    (2) III-V-semiconductor based heterojunction spin devices
    (3) Single-electron type spin transistors based on hybrid materials consisting of ferromagnetic nano-particles and semiconductors.

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Academic Activities

  • 国際シンポジウム ISAMMA2024

    Role(s)： Planning, management, etc.

    2024.1 - 2024.8

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    Type：Academic society, research group, etc. 

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  • 国際学会 SSDM2024

    Role(s)： Planning, management, etc.

    2023.12 - 2024.9

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    Type：Academic society, research group, etc. 

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  • 国際学会 ICMBE2024

    Role(s)： Planning, management, etc.

    2023.10 - 2024.9

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    Type：Academic society, research group, etc. 

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  • 国際学会 Magnetism and Magnetic Materials (MMM 2022)

    Role(s)： Planning, management, etc.

    2021.6 - 2021.10

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    Type：Academic society, research group, etc. 

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  • 日本磁気学会 編集委員会 幹事 、分野主査 (Editor in Chief)

    Role(s)： Planning, management, etc.

    2021.5 - 2025.4

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    Type：Scientific advice/Review 

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  • 応用物理学会学術講演会プログラム委員会委員

    Role(s)： Planning, management, etc.

    2016.6 - 2021.5

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    Type：Scientific advice/Review 

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  • 日本磁気学会 編集委員会 委員

    Role(s)： Planning, management, etc.

    2016.5 - 2021.4

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    Type：Scientific advice/Review 

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  • 応用物理学会 代議員

    Role(s)： Planning, management, etc.

    2015 - 2016

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    Type：Academic society, research group, etc. 

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