Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

DOI： 10.1021/acsnano.4c15409

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

DOI： 10.1038/s41467-024-53541-6

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Other Link： https://www.nature.com/articles/s41467-024-53541-6

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

DOI： 10.1038/s41467-024-52072-4

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Other Link： https://www.nature.com/articles/s41467-024-52072-4

Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/physrevb.110.024418

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Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.110.024418/fulltext

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

DOI： 10.1038/s41586-024-07673-w

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Other Link： https://www.nature.com/articles/s41586-024-07673-w

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

Abstract

The aggregation of topological spin textures at nano and micro scales has practical applications in spintronic technologies. Here, the authors report the in‐plane current‐induced proliferation and aggregation of bimerons in a bulk chiral magnet. It is found that the spin‐transfer torques can induce the proliferation and aggregation of bimerons only in the presence of an appropriate out‐of‐plane magnetic field. It is also found that a relatively small damping and a relatively large non‐adiabatic spin‐transfer torque could lead to more pronounced bimeron proliferation and aggregation. Particularly, the current density should be larger than a certain threshold in order to trigger the proliferation; namely, the bimerons may only be driven into translational motion under weak current injection. Besides, the authors find that the aggregate bimerons could relax into a deformed honeycomb bimeron lattice with a few lattice structure defects after the current injection. The results are promising for the development of bio‐inspired spintronic devices that use a large number of aggregate bimerons. The findings also provide a platform for studying aggregation‐induced effects in spintronic systems, such as the aggregation‐induced lattice phase transitions.

DOI： 10.1002/agt2.590

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

Abstract

Two-dimensional skyrmion, a topological spin texture, has been extensively investigated in non-centrosymmetric magnets. It is thermodynamically stable in bulk materials and can extend perpendicularly to the spin-rotating plane, forming the three-dimensional (3D) skyrmion string that occasionally terminates inside the bulk or at its surfaces, thereby producing spin (anti)hedgehogs. While magnetically manipulated skyrmion strings have been demonstrated thus far, an understanding of metastable skyrmion strings and their melting dynamics remain elusive. The challenge arises from the absence of a suitable 3D magnetic imaging technique that is capable of tracking their dynamics while varying the temperature. Here, we show a high-resolution 3D phase imaging to show the metastable skyrmions and their melting dynamics accompanied by the emergence of (anti)hedgehogs over a temperature range from 95 K to room temperature in helimagnets.

DOI： 10.1038/s43246-024-00512-5

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Other Link： https://www.nature.com/articles/s43246-024-00512-5

Publishing type：Research paper (scientific journal)  

DOI： 10.1038/s42005-024-01656-z

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

Abstract

Element substitutions with magnetic or non-magnetic atoms are known to significantly impact the magnetic structure and related transport properties of magnets. To clarify the change of magnetic structure of B20-type magnets with element doping, we conduct real-space observations of spin textures and their temperature (T)-magnetic field (H) phase diagrams of a helimagnet FeGe with partially substituting Fe and Ge with Co and Si, respectively. The helical period (λ) changes dramatically by the element doping: λ increases by 147% to 103 nm in 30% Co-doped FeGe, whereas it decreases by around 70% to 49 nm in 30% Si-doped FeGe, compared to the λ =70 nm in FeGe. Upon applying the magnetic field normally to (001), (110), and (111) thin plates of both FeSi_0.3Ge_0.7 and Fe_0.7Co_0.3Ge, the hexagonal skyrmion crystal (SkX) state emerges. The magnetic phase diagrams observed through the real-space imaging reveal that (1) the SkX can extend to a larger T-H window by reducing the sample thickness or by cooling the sample under specific magnetic fields from temperatures above the transition temperature (T_C); (2) the stability of the SkX phase differs between Si-doped and Co-doped FeGe: the SkX phase is most unstable in the (111) FeSi_0.3Ge_0.7, while it remains robust in the (111) Fe_0.7Co_0.3Ge. These differences indicate distinct anisotropic behavior in FeGe with magnetic (Co) and non-magnetic-element (Si) dopants.

DOI： 10.1088/2515-7639/ad2ec4

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Other Link： https://iopscience.iop.org/article/10.1088/2515-7639/ad2ec4/pdf

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

Abstract

Topological magnetic (anti)skyrmions are robust string‐like objects heralded as potential components in next‐generation topological spintronics devices due to their low‐energy manipulability via stimuli such as magnetic fields, heat, and electric/thermal current. While these 2D topological objects are widely studied, intrinsically 3D electron‐spin real‐space topology remains less explored despite its prevalence in bulky magnets. 2D‐imaging studies reveal peculiar vortex‐like contrast in the core regions of spin textures present in antiskyrmion‐hosting thin plate magnets with S₄ crystal symmetry, suggesting a more complex 3D real‐space structure than the 2D model suggests. Here, holographic vector field electron tomography captures the 3D structure of antiskyrmions in a single‐crystal, precision‐doped (Fe_0.63Ni_0.3Pd_0.07)₃P (FNPP) lamellae at room temperature and zero field. These measurements reveal hybrid string‐like solitons composed of skyrmions with topological number W = −1 on the lamellae's surfaces and an antiskyrmion (W = + 1) connecting them. High‐resolution images uncover a Bloch point quadrupole (four magnetic (anti)monopoles that are undetectable in 2D imaging) which enables the observed lengthwise topological transitions. Numerical calculations corroborate the stability of hybrid strings over their conventional (anti)skyrmion counterparts. Hybrid strings result in topological tuning, a tunable topological Hall effect, and the suppression of skyrmion Hall motion, disrupting existing paradigms within spintronics.

DOI： 10.1002/adma.202311737

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

Abstract

The use of magnetic states in memory devices has a history dating back decades, and the experimental discovery of magnetic skyrmions and subsequent demonstrations of their control via magnetic fields, heat, and electric/thermal currents have ushered in a new era for spintronics research and development. Recent studies have experimentally discovered the antiskyrmion, the skyrmion’s antiparticle, and while several host materials have been identified, control via thermal current remains elusive. In this work, we use thermal current to drive the transformation between skyrmions, antiskyrmions and non-topological bubbles, as well as the switching of helical states in the antiskyrmion-hosting ferromagnet (Fe_0.63Ni_0.3Pd_0.07)₃P at room temperature. We discover that a temperature gradient $${ { { { {\boldsymbol{\nabla } } } } } }T$$ drives a transformation from antiskyrmions to non-topological bubbles to skyrmions while under a magnetic field and observe the opposite, unidirectional transformation from skyrmions to antiskyrmions at zero-field, suggesting that the antiskyrmion, more so than the skyrmion, is robustly metastable at zero field.

DOI： 10.1038/s41467-023-42846-7

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Other Link： https://www.nature.com/articles/s41467-023-42846-7

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

Abstract

The spontaneous formation and topological transitions of vortex‐antivortex pairs have implications for a broad range of emergent phenomena, e.g., from superconductivity to quantum computing. Unlike magnets exhibiting collinear spin textures, helimagnets with noncollinear spin textures provide unique opportunities to manipulate topological forms such as (anti)merons and (anti)skyrmions. However, it is challenging to achieve multiple topological states and their interconversion in a single helimagnet due to the topological protection for each state. Here, we report the on‐demand creation of multiple topological states in a helimagnet Fe_0.5Co_0.5Ge, including a spontaneous vortex pair of meron with topological charge N = −1/2 and antimeron with N = 1/2, and a vortex‐antivortex bundle, i. e., a bimeron (meron pair) with N = −1. We demonstrate the mutual transformation between skyrmions and bimerons with respect to the competitive effects of magnetic field and magnetic shape anisotropy. We show that electric currents drive the individual bimerons to form their connecting assembly and then into a skyrmion lattice. These findings signify the feasibility of designing topological states and offer new insights into the manipulation of noncollinear spin textures for potential applications in various fields.

This article is protected by copyright. All rights reserved

DOI： 10.1002/adma.202306441

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/physrevb.108.104403

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Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.108.104403/fulltext

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

DOI： 10.1002/adma.202210646

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

Abstract

Topological charge plays a significant role in a range of physical systems. In particular, observations of real‐space topological objects in magnetic materials have been largely limited to skyrmions – states with a unitary topological charge. Recently, more exotic states with varying topology, such as antiskyrmions, merons, or bimerons and 3D states such as skyrmion strings, chiral bobbers, and hopfions, have been experimentally reported. Along these lines, the realization of states with higher‐order topology has the potential to open new avenues of research in topological magnetism and its spintronic applications. Here, real‐space imaging of such spin textures, including skyrmion, skyrmionium, skyrmion bag, and skyrmion sack states, observed in exfoliated flakes of the van der Waals magnet Fe_3−xGeTe₂ (FGT) is reported. These composite skyrmions may emerge from seeded, loop‐like states condensed into the stripe domain structure, demonstrating the possibility to realize spin textures with arbitrary integer topological charge within exfoliated flakes of 2D magnets. The general nature of the formation mechanism motivates the search for composite skyrmion states in both well‐known and new magnetic materials, which may yet reveal an even richer spectrum of higher‐order topological objects.

DOI： 10.1002/adma.202208930

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adma.202208930

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

DOI： 10.1021/acs.nanolett.2c03142

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Publishing type：Research paper (scientific journal)   Publisher：Proceedings of the National Academy of Sciences  

The manipulation and control of electron spins, the fundamental building blocks of magnetic domains and spin textures, are at the core of spintronics. Of particular interest is the effect of the electric current on topological magnetic skyrmions, such as the current-induced deformation of isolated skyrmions. The deformation has consequences ranging from perturbed dynamics to modified packing configurations. In this study, we measured the current-driven real-space deformation of isolated, pinned skyrmions within Co ₁₀ Zn ₁₀ at room temperature. We observed that the skyrmions are surprisingly soft, readily deforming during electric current application into an elliptical shape with a well-defined deformation axis (semimajor axis). We found that this axis rotates unidirectionally toward the current direction irrespective of electric current polarity and that the elliptical deformation reverses back upon current termination. We quantified the average distortion δ, which increased by ∼90% during the largest applied current density | j | = 8.46 ×10 ⁹ A/m ² when compared with the skyrmion’s intrinsic shape ( ). Additionally, we demonstrated an approximately 120% average skyrmion core size expansion during current application, highlighting the skyrmions’ inherent topological protection. This evaluation of in situ electric current–induced skyrmion deformation paints a clearer picture of spin-polarized electron–skyrmion interactions and may prove essential in designing spintronic devices.

DOI： 10.1073/pnas.2200958119

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Publishing type：Research paper (scientific journal)   Publisher：International Union of Crystallography (IUCr)  

Co–Zn–Mn chiral cubic magnets display versatile magnetic skyrmion phases, including equilibrium phases stable far above and far below room temperature, and the facile creation of robust far-from-equilibrium skyrmion states. In this system, compositional disorder and magnetic frustration are key ingredients that have profound effects on the chiral magnetism. Reported here are studies of the magnetism in Co_6.75Zn_6.75Mn_6.5 by magnetometry, small-angle neutron scattering (SANS), magnetic diffuse neutron scattering and Lorentz transmission electron microscopy (LTEM). While features in magnetometry and LTEM often give standard indications for skyrmion formation, they are not readily observed from the measurements on this system. Instead, skyrmion lattice correlations are only revealed by SANS, and they are found to form an orientationally disordered structure in a minority fraction of the sample. The majority fraction of the sample always displays orientationally disordered helical spin correlations, which undergo further disordering along the radial direction on cooling below the critical temperature (T_c ≃ 102 K). The near-complete suppression of the skyrmion phase, and the process of disordering on cooling, are attributed to competing magnetic interactions that dominate over the ferromagnetic interaction expected to favour chiral magnetism in this system. These competing interactions start to develop above T_c and become further enhanced towards low temperatures. The present observations of co-existing and disordered magnetic correlations over multiple length scales are not unique to Co_6.75Zn_6.75Mn_6.5 but are seemingly common to the family of Co–Zn–Mn compounds with finite Mn, and their accurate description presents a challenge for theoretical modelling. In addition, this study highlights a need for neutron instrumentation capable of the comprehensive measurement of magnetic correlations over expanded ranges of momentum transfer in such multiple-length-scale magnets.

DOI： 10.1107/s1600576722007403

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

DOI： 10.1002/advs.202202950

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/advs.202202950

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

DOI： 10.1038/s41563-021-01186-x

Web of Science

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Other Link： https://www.nature.com/articles/s41563-021-01186-x

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

DOI： 10.1002/adma.202108770

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adma.202108770

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jmmm.2021.168332

Web of Science

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

DOI： 10.1038/s41467-021-27073-2

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

DOI： 10.1002/adfm.202103583

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adfm.202103583

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

DOI： 10.1038/s41467-021-25291-2

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Other Link： https://www.nature.com/articles/s41467-021-25291-2

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Cambridge University Press (CUP)  

DOI： 10.1017/s1431927621001896

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

The unique life cycle of the skyrmions was precisely tracked by pump-probe Lorentz transmission electron microscopy.

DOI： 10.1126/sciadv.abg1322

PubMed

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

DOI： 10.1038/s41563-020-00898-w

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Other Link： http://www.nature.com/articles/s41563-020-00898-w

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

DOI： 10.1002/adfm.202008521

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adfm.202008521

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

DOI： 10.1038/s41467-020-20384-w

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Other Link： http://www.nature.com/articles/s41467-020-20384-w

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

DOI： 10.1063/5.0036862

Web of Science

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Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/physrevb.102.180402

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Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.102.180402/fulltext

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

DOI： 10.1002/adma.202004206

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adma.202004206

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

DOI： 10.1021/acs.nanolett.0c02708

Web of Science

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

DOI： 10.1038/s41565-020-0684-7

Web of Science

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

Nanometer-scale skyrmions are prospective candidates for information bits in low–power consumption devices owing to their topological nature and controllability with low current density. Studies on skyrmion dynamics in different classes of materials have exploited the topological Hall effect and current-driven fast motion of skyrmionic bubbles. However, the small current track motion of a single skyrmion and few-skyrmion aggregates remains elusive. Here, we report the tracking of creation and extinction and motion of 80-nm-size skyrmions upon directional one–current pulse excitations at low current density of the order of 10⁹ A m⁻² in designed devices with the notched hole. The Hall motion of a single skyrmion and the torque motions of few-skyrmion aggregates have been directly revealed. The results exemplify low–current density controls of skyrmions, which will pave the way for the application of skyrmions.

DOI： 10.1126/sciadv.aaz9744

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

DOI： 10.1063/5.0007389

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

DOI： 10.1038/s41565-019-0616-6

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

DOI： 10.1038/s41467-019-08985-6

Scopus

PubMed

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Other Link： http://www.nature.com/articles/s41467-019-08985-6

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

The quantum anomalous Hall effect (QAHE) is an exotic quantum phenomenon
originating from dissipation-less chiral channels at the sample edge. While the
QAHE has been observed in magnetically doped topological insulators (TIs),
exploiting magnetic proximity effect on the TI surface from adjacent
ferromagnet layers may provide an alternative approach to the QAHE by opening
an exchange gap with less disorder than that in the doped system. Nevertheless,
the engineering of a favorable heterointerface that realizes the QAHE based on
the magnetic proximity effect remains to be achieved. Here, we report on the
observation of the QAHE in a proximity coupled system of non-magnetic TI and
ferromagnetic insulator (FMI). We have designed sandwich heterostructures of
(Zn,Cr)Te/(Bi,Sb)2Te3/(Zn,Cr)Te that fulfills two prerequisites for the
emergence of the QAHE; the formation of a sizable exchange gap at the TI
surface state and the tuning of the Fermi energy into the exchange gap. The
efficient proximity coupling in the all-telluride based heterostructure as
demonstrated here will enable a realistic design of versatile tailor-made
topological materials coupled with ferromagnetism, ferroelectricity,
superconductivity, and so on.

DOI： 10.1063/1.5111891

arXiv

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Cambridge University Press (CUP)  

DOI： 10.1017/s1431927619009930

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Publishing type：Research paper (scientific journal)   Publisher：Cambridge University Press (CUP)  

DOI： 10.1017/s1431927619001004

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

Magnetic skyrmions are topological spin textures that have shown promise for future nonvolatile memory devices. Herein, we report on the stability of magnetic skyrmions in alloyed cubic B20 Fe1-xCo
x
Si nanowires (NWs) determined using off-axis electron holography and magnetotransport measurements. This study presents the real space observation of one-dimensional skyrmion lattice in a NW of Fe1-xCo
x
Si which shows that the skyrmion phase in a Fe0.75Co0.25Si NW exists at lower applied magnetic fields (200 Oe) with a reduced domain size (28 ± 2 nm) in comparison to bulk and thin film samples. Magnetotransport measurements were used to observe the helimagnetic transition temperature dependence on the cobalt concentration in the Fe1-xCo
x
Si NWs. Field-dependent magnetoresistance measurements of Fe1-xCo
x
Si NWs under applied magnetic field parallel to the NW axis and their second derivative plots reveal the critical fields for the magnetic state transition at different temperatures. A representative magnetic phase diagram constructed with the results from transport measurements of a Fe0.81Co0.19Si NW clearly shows expanded stability region for magnetic skyrmions in the Fe1-xCo
x
Si NWs.

DOI： 10.1021/acsnano.9b02130

PubMed

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.74.2.0_2004

CiNii Research

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

DOI： 10.1038/s41467-019-13675-4

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arXiv

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1038/s41586-018-0745-3

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Other Link： http://www.nature.com/articles/s41586-018-0745-3.pdf

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

DOI： 10.1103/PhysRevB.98.155120

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Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

DOI： 10.1117/12.2319900

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

DOI： 10.1126/sciadv.aar7043

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

DOI： 10.1038/s41567-018-0155-3

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

DOI： 10.7566/JPSJ.87.074704

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

DOI： 10.1103/PhysRevLett.120.037203

Scopus

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Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.120.037203/fulltext

Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.73.1.0_2320

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.73.1.0_968

CiNii Research

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

DOI： 10.1038/s41598-017-16519-7

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Publishing type：Research paper (scientific journal)   Publisher：Cambridge University Press (CUP)  

DOI： 10.1017/s143192761700294x

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

DOI： 10.1002/adma.201606178

Web of Science

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

DOI： 10.1021/acs.nanolett.6b04821

Web of Science

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：National Academy of Sciences  

DOI： 10.1073/pnas.1118496109

Scopus

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

DOI： 10.1002/adma.201603958

Web of Science

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Language：English  

DOI： 10.1073/pnas.1619858114

Web of Science

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.72.2.0_1652

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

DOI： 10.1038/srep25748

Scopus

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Other Link： http://www.nature.com/articles/srep25748.pdf

Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

DOI： 10.1103/PhysRevB.93.134417

Scopus

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Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.93.134417/fulltext

Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.71.2.0_717

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.71.2.0_1728

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Institute of Physics Inc.  

DOI： 10.1063/1.4936078

Scopus

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

DOI： 10.1021/acs.nanolett.5b02653

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arXiv

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

DOI： 10.1103/PhysRevB.91.054411

Scopus

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

DOI： 10.1103/PhysRevB.91.054411

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

DOI： 10.1038/ncomms8638

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Other Link： http://www.nature.com/articles/ncomms8638

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

DOI： 10.1038/nnano.2014.52

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

DOI： 10.1038/nmat3862

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Other Link： http://www.nature.com/articles/nmat3862

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

DOI： 10.1038/ncomms4198

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

DOI： 10.1103/PHYSREVLETT.112.059702

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

DOI： 10.1021/nl401687d

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

DOI： 10.1103/PhysRevB.88.024408

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

DOI： 10.1063/1.4809937

Scopus

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevLett.110.117202

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

DOI： 10.1038/nnano.2013.174

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Other Link： http://www.nature.com/articles/nnano.2013.174

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

DOI： 10.1098/rsta.2011.0405

Scopus

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1073/pnas.1118496109

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science  

DOI： 10.1126/science.1214143

Scopus

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

DOI： 10.1021/nl300073m

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

DOI： 10.1038/ncomms1990

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.83.174401

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.83.130401

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Nature Publishing Group  

DOI： 10.1038/nmat2916

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Other Link： http://www.nature.com/articles/nmat2916

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

DOI： 10.1093/jmicro/dfq035

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

DOI： 10.1016/j.ultramic.2009.11.014

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

DOI： 10.1038/nature09124

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DOI： 10.1093/jmicro/dfp043

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.80.094406

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Proceedings of the National Academy of Sciences  

DOI： 10.1073/pnas.0907618106

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PubMed

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

DOI： 10.1063/1.3194313

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Language：English   Publishing type：Part of collection (book)   Publisher：Nova Science Publishers, Inc.  

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

DOI： 10.1017/S1431927609093179

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

DOI： 10.1063/1.3216589

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

DOI： 10.1063/1.3086311

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

DOI： 10.1143/JPSJ.77.124712

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DOI： 10.1143/JPSJ.77.093709

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

DOI： 10.1209/0295-5075/80/37001

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.75.184440

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.75.174441

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DOI： 10.1103/PhysRevB.75.174441

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Physics Publishing  

DOI： 10.1088/0953-8984/19/17/172203

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.75.144407

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

DOI： 10.1103/PhysRevB.75.144407

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

DOI： 10.1016/j.jmmm.2006.10.1054

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DOI： 10.1016/j.jmmm.2006.10.911

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

DOI： 10.1016/j.jmmm.2005.09.034

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.74.020404

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevLett.95.227204

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevB.72.092404

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

DOI： 10.1016/j.tsf.2004.10.055

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

DOI： 10.1093/jmicro/dfh104

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevLett.93.167202

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

DOI： 10.1063/1.1767279

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

DOI： 10.1103/PhysRevLett.92.137401

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

DOI： 10.1103/PhysRevLett.92.047401

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.71.1.0_1969

CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.71.1.0_1967

CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.71.1.0_1966

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CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.70.2.0_920

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DOI： 10.11316/jpsgaiyo.70.2.0_951

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.70.2.0_1663

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Language：English   Publishing type：Rapid communication, short report, research note, etc. (scientific journal)  

DOI： 10.1103/PhysRevLett.112.059702

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.69.1.3.0_632_2

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CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.68.2.3.0_417_1

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.67.1.3.0_566_1

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DOI： 10.11316/jpsgaiyo.67.2.3.0_436_2

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DOI： 10.11316/jpsgaiyo.67.1.3.0_566_2

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DOI： 10.11316/jpsgaiyo.67.1.3.0_691_3

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Language：Japanese   Publisher：The Crystallographic Society of Japan  

The formation of a triangular lattice of the topological spin textures (skyrmions) is suggested by recent neutron scattering studies on B20-type helical magnets. We have observed the real-space image of the skyrmion lattice in Fe_0.5Co_0.5Si by Lorentz transmission electron microscopy. Besides the perfect hexagonal arrangement of skyrmions, we have observed the disordered or isolated skyrmions as well as the coexistence with helical spin order. Furthermore, we have found that the skyrmion lattice is quite stable over a wide temperature region in a thin crystal plate with its thickness smaller than the skyrmion lattice constant.

DOI： 10.5940/jcrsj.53.274

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Language：Japanese   Publisher：The Crystallographic Society of Japan  

Correlations between magnetic and crystallographic domains in an ordered double perovskite, Ba₂FeMoO₆, were investigated by transmission electron microscopy. We found that magnetic domain walls perfectly coincide with crystallographic antiphase domain boundaries. This suggests a pinning effect on the magnetic domains at the antiphase boundaries. In addition, we observed a magnetic nanodomain structure derived from coupling between magnetic and structural ordering domains where Fe/Mo short-range ordering was developed. The magnetic domain structure in the ordered double perovskite is significantly affected by the crystallographic structures, i.e., the antiphase boundary and the short-range ordering, due to their strong mutual coupling.

DOI： 10.5940/jcrsj.53.119

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.66.2.3.0_474_1

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DOI： 10.11316/jpsgaiyo.66.2.3.0_473_4

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Language：Japanese   Publisher：The Japanese Society of Microscopy  

<p>Skyrmion is a novel more complex and nontrivial spin texture originally introduced as a model in nuclear physics to describe a localized particle-like configuration of field theory. Although the skyrmion in a magnetic solid is anticipated to produce unconventional spin-electronic functions such as the topological Hall effect, the skyrmion dynamics and its crystallography is not straightforward. To scrutinize the individual structure of skyrmion, we devised the skyrmion crystal (SkX) state as a two-dimensional (2D) magnet in a thin crystal of helical magnet Fe_0.5Co_0.5Si and performed the real-space observation by means of cryo-Lorentz transmission electron microscopy with a change of the magnetic-field lens current.</p>

DOI： 10.11410/kenbikyo.45.4_273

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CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.65.2.3.0_549_1

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.64.1.3.0_623_1

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CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.64.1.3.0_560_3

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Language：Japanese   Publisher：日本粘土学会  

CiNii Books

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.63.1.3.0_619_4

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Language：English   Publishing type：Research paper, summary (international conference)  

DOI： 10.1107/S0108767308083189

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.63.2.3.0_459_2

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DOI： 10.11316/jpsgaiyo.63.1.3.0_578_4

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Language：Japanese   Publisher：The Crystallographic Society of Japan  

The variation of the superstructure related to the charge/orbital ordering in layered manganites RE_0.5 (Ca_1-ySr_y) _1.5MnO₄ (RE = Pr or Eu) has been systematically investigated by lowtemperature transmission electron microscopy (TEM), It is found that the superstructure is collapsed as increasing (1) the average ionic radius (rA) of A-site cations or enhancing (2) the quenched disorder by the substituting Sr for Ca. The results indicate that the electronic phase of the single layered manganites is controlled not only by the average ionic radius of A-site, but also by the quenched disorder ascribed as the variance in A-site ionic radii (&sigma;² = &Sigma;_ix_ir_i²-r_A²) .

DOI： 10.5940/jcrsj.49.300

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.62.1.3.0_490_2

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.61.1.3.0_546_4

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.61.2.3.0_480_1

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Language：Japanese   Publisher：一般社団法人 日本物理学会  

DOI： 10.11316/jpsgaiyo.61.1.3.0_537_3

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Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

CiNii Books

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Language：Japanese   Publisher：The Crystallographic Society of Japan  

Dynamic behavior of magnetic domain structures and relationship between crystal structures and the magnetic domain structures in strongly correlated transition metal oxides were investigated by Lorentz electron microscopy. We found that there are interactions between magnetic domain structures and crystallographic defect structures, such as twin boundaries and antiphase boundaries. We review the characteristic magnetic domain structures in distorted perovskite-type Nd_1/2Sr_1/2MnO₃ and double perovskite Ba₂FeMoO₆.

DOI： 10.5940/jcrsj.47.83

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.60.1.3.0_564_4

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DOI： 10.11316/jpsgaiyo.59.1.3.0_540_1

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DOI： 10.11316/jpsgaiyo.59.2.3.0_419_3

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DOI： 10.11316/jpsgaiyo.59.1.3.0_574_4

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DOI： 10.11316/jpsgaiyo.59.1.3.0_592_1

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Language：Japanese   Publisher：The Physical Society of Japan  

DOI： 10.11316/jpsgaiyo.58.2.4.0_610_3

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Venue：The SODOH Higashiyama Kyoto   Country：Japan  

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Venue：Okochi-Hall, Wako Campus, RIKEN   Country：Japan  

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Venue：Makuhari Messe （Chiba）   Country：Japan  

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Venue：Makuhari Messe (Chiba)   Country：Japan  

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Venue：Seattle, Washington   Country：United States  

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Venue：Shenzhen  

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Venue：Boston MA   Country：United States  

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Venue：Boston, Massachusetts   Country：United States  

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Venue：Online  

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Venue：Busan   Country：Korea, Republic of  

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Presentation type：Oral presentation (general)  

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Venue：Matsue-City Shimane Prefecture  

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Venue：Sendai   Country：Japan  

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Venue：Sendai International Center Sendai, Japan   Country：Japan  

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Venue：San Francisco, California   Country：United States  

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Venue：Online  

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Event date： 2022.11 - 2022.12

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Venue：Hawaii convention center   Country：United States  

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Venue：New Orleans, LA   Country：United States  

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Venue：New Orleans, LA   Country：United States  

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Venue：New Orleans, LA   Country：United States  

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Venue：Jeju   Country：Korea, Republic of  

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Venue：東京大学 武田ホール   Country：Japan  

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Venue：Mainz   Country：Germany  

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Venue：東海大学 湘南キャンパス   Country：Japan  

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Venue：Baltimore, Maryland   Country：United States  

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Venue：大阪電気通信大学   Country：Japan  

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Venue：東北大学 片平キャンパス   Country：Japan  

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Venue：Tokai   Country：Japan  

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Country：Japan  

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Venue：東京   Country：Japan  

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Venue：Dalian   Country：China  

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Venue：東京  

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Venue：Tokyo  

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Venue：東京   Country：Japan  

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