Kosuke Karube
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View article: Nonreciprocal transport in a room-temperature chiral magnet
Nonreciprocal transport in a room-temperature chiral magnet Open
Chiral magnets under broken time-reversal symmetry can give rise to rectification of moving electrons, called nonreciprocal transport. Several mechanisms, such as the spin fluctuation–induced chiral scattering and asymmetry in the electron…
View article: Nonreciprocal transport in a room-temperature chiral magnet
Nonreciprocal transport in a room-temperature chiral magnet Open
Chiral magnets under broken time-reversal symmetry can give rise to rectification of moving electrons, called nonreciprocal transport. Several mechanisms, such as the spin fluctuation–induced chiral scattering and asymmetry in the electron…
View article: Research on Quantum Materials and Quantum Technology at RIKEN
Research on Quantum Materials and Quantum Technology at RIKEN Open
RIKEN covers fundamental research on physics, chemistry, biology, life and medical science, information and mathematical science, and engineering. Here, we outline research activities on quantum materials and quantum technology that includ…
View article: Erratum: Spin wave stiffness and damping in a frustrated chiral helimagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Co</mml:mi><mml:mn>8</mml:mn></mml:msub><mml:msub><mml:mi>Zn</mml:mi><mml:mn>8</mml:mn></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> as measured by small-angle neutron scattering [Phys. Rev. Research <b>4</b>, 023239 (2022)]
Erratum: Spin wave stiffness and damping in a frustrated chiral helimagnet as measured by small-angle neutron scattering [Phys. Rev. Research <b>4</b>, 023239 (2022)] Open
Published by the American Physical Society 2024
View article: Giant Hall effect in a highly conductive frustrated magnet GdCu$_2$
Giant Hall effect in a highly conductive frustrated magnet GdCu$_2$ Open
The Hall effect is one of the most fundamental but elusive phenomena in condensed matter physics due to the rich variety of underlying mechanisms. Here we report an exceptionally large Hall effect in a frustrated magnet GdCu$_2$ with high …
View article: Competing anisotropies in the chiral cubic magnet Co$_8$Zn$_8$Mn$_4$ unveiled by resonant x-ray magnetic scattering
Competing anisotropies in the chiral cubic magnet Co$_8$Zn$_8$Mn$_4$ unveiled by resonant x-ray magnetic scattering Open
The cubic $β$-Mn-type alloy Co$_8$Zn$_8$Mn$_4$ is a chiral helimagnet that exhibits a peculiar temperature-dependent behavior in the spiral pitch, which decreases from 130 nm at room temperature to 70 nm below 20 K. Notably, this shortenin…
View article: Discovery of a Bloch point quadrupole constituting hybrid topological strings
Discovery of a Bloch point quadrupole constituting hybrid topological strings Open
Topological magnetic (anti)skrymions are robust string-like objects heralded as potential components in next-generation topological spintronics devices due to their manipulability via low-energy stimuli such as magnetic fields, heat, and e…
View article: Task-adaptive physical reservoir computing
Task-adaptive physical reservoir computing Open
Reservoir computing is a neuromorphic architecture that potentially offers viable solutions to the growing energy costs of machine learning. In software-based machine learning, neural network properties and performance can be readily recon…
View article: Topological melting of the metastable skyrmion lattice in the chiral magnet Co$_9$Zn$_9$Mn$_2$
Topological melting of the metastable skyrmion lattice in the chiral magnet Co$_9$Zn$_9$Mn$_2$ Open
In a $β$-Mn-type chiral magnet Co$_9$Zn$_9$Mn$_2$, we demonstrate that the magnetic field-driven collapse of a room temperature metastable topological skyrmion lattice passes through a regime described by a partial topological charge inver…
View article: Real Space Demonstration of Electric Current-Induced Isolated Skyrmion Deformation
Real Space Demonstration of Electric Current-Induced Isolated Skyrmion Deformation Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Highly anisotropic geometrical Hall effect via f-d exchange fields in doped pyrochlore molybdates
Highly anisotropic geometrical Hall effect via f-d exchange fields in doped pyrochlore molybdates Open
When a conduction electron couples with a non-coplanar localized magnetic moment, the real-space Berry curvature is exerted to cause the geometrical Hall effect, which is not simply proportional to the magnetization. So far, it has been id…
View article: Real-space observations of three-dimensional antiskyrmions and skyrmion strings
Real-space observations of three-dimensional antiskyrmions and skyrmion strings Open
Nanometric topological spin textures, such as magnetic skyrmions (Sks) and antiskyrmions (antiSks), have attracted much attention in condensed matter physics and spintronics. To date, most studies have focused on two-dimensional Sks and an…
View article: Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering
Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering Open
The repository contains the data presented in the figures in the manuscript entitled "Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering". Requests for further informa…
View article: Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering
Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering Open
The repository contains the data presented in the figures in the manuscript entitled "Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering". Requests for further informa…
View article: Current-driven Dynamics of Magnetic Skyrmion Bunches
Current-driven Dynamics of Magnetic Skyrmion Bunches Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Author Correction: Vital role of magnetocrystalline anisotropy in cubic chiral skyrmion hosts
Author Correction: Vital role of magnetocrystalline anisotropy in cubic chiral skyrmion hosts Open
View article: Vital role of magnetocrystalline anisotropy in cubic chiral skyrmion hosts
Vital role of magnetocrystalline anisotropy in cubic chiral skyrmion hosts Open
View article: Frustration-driven magnetic fluctuations as the origin of the low-temperature skyrmion phase in Co7Zn7Mn6
Frustration-driven magnetic fluctuations as the origin of the low-temperature skyrmion phase in Co7Zn7Mn6 Open
View article: Frustration-driven magnetic fluctuations as the origin of the low temperature skyrmion phase in Co7Zn7Mn6
Frustration-driven magnetic fluctuations as the origin of the low temperature skyrmion phase in Co7Zn7Mn6 Open
22nd March 2021 The file "npj_Co7Zn7Mn6_data.zip" contains the raw data presented in the figures in the manuscript entitled "Frustration-driven magnetic fluctuations as the origin of the low temperature skyrmion phase in Co7Zn7Mn6". In th…
View article: Frustration-driven magnetic fluctuations as the origin of the low temperature skyrmion phase in Co7Zn7Mn6
Frustration-driven magnetic fluctuations as the origin of the low temperature skyrmion phase in Co7Zn7Mn6 Open
22nd March 2021 The file "npj_Co7Zn7Mn6_data.zip" contains the raw data presented in the figures in the manuscript entitled "Frustration-driven magnetic fluctuations as the origin of the low temperature skyrmion phase in Co7Zn7Mn6". In th…
View article: Vital role of anisotropy in cubic chiral skyrmion hosts
Vital role of anisotropy in cubic chiral skyrmion hosts Open
The impact of magnetic anisotropy on the skyrmion lattice (SkL) state in cubic chiral magnets has been overlooked for long, partly because a semi-quantitative description of the thermodynamically stable SkL phase pocket forming near the Cu…
View article: Publisher's Note: Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature [Phys. Rev. Materials <b>1</b>, 074405 (2017)]
Publisher's Note: Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature [Phys. Rev. Materials <b>1</b>, 074405 (2017)] Open
Received 3 January 2019DOI:https://doi.org/10.1103/PhysRevMaterials.3.019901©2019 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasMagnetic phase transitionsTopological materialsPhysical Systems3-dimensional systemsAl…
View article: Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet
Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet Open
Magnetic skyrmions are vortex-like topological spin textures often observed to form a triangular-lattice skyrmion crystal in structurally chiral magnets with Dzyaloshinskii-Moriya interaction. Recently $β$-Mn structure-type Co-Zn-Mn alloys…
View article: Ferromagnetic critical behavior and critical universality in itinerant-electron metamagnet UCoAl
Ferromagnetic critical behavior and critical universality in itinerant-electron metamagnet UCoAl Open