Magnetic Skyrmion Materials

Tokura, Y.; Kanazawa, Naoya

doi:10.1021/acs.chemrev.0c00297

Cited by 473 publications

(330 citation statements)

References 350 publications

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“…Since the cubic anisotropy in such crystals is typically negligibly small and, to a first approximation, Heisenberg exchange and DMI are assumed to be isotropic, it is common to refer to them as isotropic chiral magnets. In such systems, DMI is predicted to favor skyrmion solutions of fixed chirality 6 , in agreement with experimental observations [7][8][9][10] .…”

supporting

confidence: 83%

Magnetic particle-antiparticle creation and annihilation

Zheng

Kiselev

Yang

et al. 2021

Preprint

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A fundamental property of particles and antiparticles, such as electrons and positrons, is their ability to annihilate one another. Similar behavior is predicted for magnetic solitons~\cite{Kovalev_90}-- localized spin textures that can be distinguished by their topological index Q.Theoretically, magnetic topological solitons with opposite values of Q, such as skyrmions~\cite{Bogdanov_89} and their antiparticles -- antiskyrmions -- are expected to be able to merge continuously and to annihilate~\cite{Kuchkin_20i}. However, experimental verification of such particle-antiparticle pair production and annihilation processes has been lacking. Here, we report the creation and annihilation of skyrmion-antiskyrmion pairs in an exceptionally thin film of the cubic chiral magnet B20-type FeGe observed using transmission electron microscopy. Our observations are highly reproducible and are fully consistent with micromagnetic simulations. Our findings provide a new platform for fundamental studies of particles and antiparticles based on magnetic solids and open new perspectives for practical applications of thin films of isotropic chiral magnets.

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supporting

confidence: 83%

Magnetic particle-antiparticle creation and annihilation

Zheng

Kiselev

Yang

et al. 2021

Preprint

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“…Almost concurrently, bulk Cu 2 OSeO 3 crystal was found to host Bloch-type SkL as it possesses bulk DMI similar to B20 compounds, due to the T symmetry. 40 In contrast, the lacunar spinel VOSe 2 O 5 was found to stabilize Néel-type SkL and incommensurate (IC) spin-crystal neighbouring phases as verified by neutron scattering. 41 Its polar crystal structure was found to play the crucial role of providing the C 4v symmetry, although no sharp material interface was involved.…”

Section: Materials Developmentmentioning

confidence: 92%

Skyrmionics in correlated oxides

et al. 2021

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While chiral magnets, metal-based magnetic multilayers, or Heusler compounds have been considered as the material workhorses in the field of skyrmionics, oxides are now emerging as promising alternatives, as they host special correlations between the spin–orbital–charge–lattice degrees of freedom and/or coupled ferroic order parameters. These interactions open new possibilities for practically exploiting skyrmionics. In this article, we review the recent advances in the observation and control of topological spin textures in various oxide systems. We start with the discovery of skyrmions and related quasiparticles in bulk and heterostructure ferromagnetic oxides. Next, we emphasize the shortcomings of implementing ferromagnetic textures, which have led to the recent explorations of ferrimagnetic and antiferromagnetic oxide counterparts, with higher Curie temperatures, stray-field immunity, low Gilbert damping, ultrafast magnetic dynamics, and/or absence of skyrmion deflection. Then, we highlight the development of novel pathways to control the stability, motion, and detection of topological textures using electric fields and currents. Finally, we present the outstanding challenges that need to be overcome to achieve all-electrical, nonvolatile, low-power oxide skyrmionic devices. Graphical abstract

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“…Owing to the development of experimental techniques and a more comprehensive understanding of theoretical mechanisms, various new magnetic functional materials with specific application potentials have been investigated, such as magnetoimpedance and microwave materials, colossal magnetoresistance materials, magnetic shape memory alloys, and magnetic refrigeration materials, which are crucial to various industrial fields. [1][2][3][4][5][6][7][8][9] In the last several decades, topological magnetism has been investigated extensively, and topological spin textures in magnetic materials have provided new opportunities for magnetic and spintronic applications. Among them, magnetic skyrmions have been widely investigated because of their promising potential applications in information storage and processing devices.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, magnetic skyrmions have been widely investigated because of their promising potential applications in information storage and processing devices. [8,9] Skyrmion was first proposed by Skyrme in 1962, and this type of particle is topologically protected. [10] When it can be characterized by a topological integer number, the topological integer will not change under continuous external field changes.…”

Section: Introductionmentioning

confidence: 99%

“…[22] It was theoretically verified that the DMI is vital to the formation of skyrmion in most chiral magnets. [9] In subsequent studies, magnetic skyrmions have been discovered in frustrating magnets, centrosymmetric magnets, [23,24] and artificial membrane structures. [25][26][27] Correspondingly, other energies terms such as frustration interactions, magnetic anisotropy, magnetic dipole interactions, crystal field effects, long-range magnetic interactions, and Zeeman energy were confirmed to have participated in the formation of skyrmions.…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress in Exploring the Magnetic Solids with Room‐Temperature Skyrmionic Spin Configurations

2021

Physica Status Solidi (a)

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Magnetic materials with skyrmionic spin configurations have been widely investigated in recent years owing to their promising applications for magnetic memory storage and logic circuits. Considering their practical applications, room‐temperature skyrmion‐hosting magnetic materials shall be investigated comprehensively. The characteristics of magnetic skyrmions are closely associated with the physical properties of the host magnetic materials. The symmetry of the crystal structure, magnetic order temperature, and geometric shape of magnetic materials significantly affect the formation and annihilation of magnetic skyrmions. In addition to the intrinsic properties of materials, detection methods are vital to the investigation of new materials. Herein, the techniques for detecting magnetic skyrmions are briefly summarized, and the results of room‐temperature magnetic skyrmion hosting magnetic solids (the artificial materials are not included) with different topological characteristics from recent years are presented.

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Magnetic Skyrmion Materials

Cited by 473 publications

References 350 publications

Magnetic particle-antiparticle creation and annihilation

Magnetic particle-antiparticle creation and annihilation

Skyrmionics in correlated oxides

Recent Progress in Exploring the Magnetic Solids with Room‐Temperature Skyrmionic Spin Configurations

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