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We investigate an electromagnetic instability in two-dimensional materials arising from an anisotropy of the Fermi surface, utilizing a kinetic model accounting for the effects of the values of temperature, chemical potential and anisotropy…

材料科学 · 物理学 2025-06-27 Diogo Simões , Hugo Terças , Jorge Ferreira

We report the investigation of magnetostrictive property of polycrystalline ZnO film at room temperature on rotating a magnetic field in the plane of the film from 0 deg to 90 deg by an indigenously developed optical cantilever beam…

材料科学 · 物理学 2026-03-31 Suman Guchhait , Saumen Chaudhuri , A. K. Das

The kinetics of aggregation in a monolayer of magnetic particles are studied using stochastic dynamics computer simulations. At low densities (<8% coverage) the equilibrium structure is made up of chains and rings; the primary mechanisms by…

软凝聚态物质 · 物理学 2007-05-23 Peter D. Duncan , Philip J. Camp

Magnetic skyrmions form in chiral multilayers from the shrinking or fission of elongated stripe textures. Here we report an experimental and theoretical study of the temperature dependence of this stripe-to-skyrmion transition in…

介观与纳米尺度物理 · 物理学 2022-04-22 Xiaoye Chen , Edwin Chue , Jian Feng Kong , Hui Ru Tan , Hang Khume Tan , Anjan Soumyanarayanan

An experimental study of magnetic flux penetration under crossed magnetic fields in Bi2212:Pb single crystals is performed by the magneto-optic technique. The anisotropy of the flux creep rate induced by the in-plane magnetic field is…

超导电性 · 物理学 2015-06-24 L. S. Uspenskaya , A. B. Kulakov , A. L. Rakhmanov

Envisaged applications of skyrmions in magnetic memory and logic devices crucially depend on the stability and mobility of these topologically non-trivial magnetic textures in thin films. We present for the first time quantitative maps of…

Magnetic skyrmions are topologically protected spin textures that exhibit many fascinating features. As compared to the well-studied cryogenic Bloch skyrmions in bulk materials, we focus on the room-temperature N\'eel skyrmions in thin-film…

We study the stabilization and electrical manipulation of skyrmions in magnetic ultrathin films in the absence of an applied magnetic field. We show that this requires an increased magnetic anisotropy, controlled by the sample thickness, as…

材料科学 · 物理学 2023-01-06 Sougata Mallick , Sujit Panigrahy , Gajanan Pradhan , Stanislas Rohart

Chiral magnets are an emerging class of topological matter harbouring localized and topologically protected vortex-like magnetic textures called skyrmions, which are currently under intense scrutiny as a new entity for information storage…

This study investigates the stability of skyrmions and biskyrmions in perpendicular magnetic tunneling junctions with a thick CoFeB/Ta/CoFeB free layer. The samples showed a magnetoresistance of ~ 41% when annealed at 230 {\deg}C. Magnetic…

材料科学 · 物理学 2026-03-13 W. Al Saidi , S. Amara , M. T. Zar Myint , S. Al Harthi , G. Setti , R. Sbiaa

Complex magnetic materials hosting topologically non-trivial particle-like objects such as skyrmions are under intensive research and could fundamentally change the way we store and process data. One important class of materials are…

介观与纳米尺度物理 · 物理学 2023-05-01 Martin Lang , Marijan Beg , Ondrej Hovorka , Hans Fangohr

We clarify the conditions for the emergence of multiple-${\bf Q}$ structures out of lattice and easy-axis spin anisotropy in frustrated magnets. By considering magnets whose exchange interaction has multiple global minima in momentum space,…

介观与纳米尺度物理 · 物理学 2016-05-16 Satoru Hayami , Shi-Zeng Lin , Cristian D. Batista

Symmetry breaking together with strong spin-orbit interaction give rise to many exciting phenomena within condensed matter physics. A recent example is the existence of chiral spin textures, which are observed in magnetic systems lacking…

介观与纳米尺度物理 · 物理学 2017-09-26 Wanjun Jiang , Gong Chen , Kai Liu , Jiadong Zang , Suzanne G. E. te Velthuis , Axel Hoffmann

We study the modification of micromagnetic configurations in nanostructures, due to the Dzyaloshinskii-Moriya interaction (DMI) that appear at the interface of an ultrathin film. We show that this interaction leads to new micromagnetic…

介观与纳米尺度物理 · 物理学 2015-06-17 S. Rohart , A. Thiaville

Skyrmions, topologically stable magnetic solitons characterized by whirling magnetization in nanoscale magnetic elements, show promise information carriers in spintronics and spin-based quantum computing due to their unique properties:…

介观与纳米尺度物理 · 物理学 2024-11-08 Suyeong Jeong , Dae-Han Jung , Hee-Sung Han , Ganghwi Kim , Myeonghwan Kang , Mi-Young Im , Younggun Park , Ki-Suk Lee

Magnetic skyrmions are chiral spin textures which have attracted intense research for their fundamentally novel physics and potential applications as spintronic information carriers. The stability which makes them so potentially useful is a…

材料科学 · 物理学 2025-01-07 William S. Parker , Jacques A. Reddinger , Benjamin J. McMorran

Magnetic chiral bobbers (CBs) are three-dimensional (3D) topological spin textures that consist of a tapered skyrmion tube terminating in a Bloch point, promising applications in high-density spintronics. However, the mechanisms controlling…

材料科学 · 物理学 2026-01-09 S. Y. Lu , Y. F. Duan , D. X. Yu , H. M. Dong

Non-centrosymmetric magnetic materials are a promising platform for stabilizing chiral spin textures, such as skyrmions and cycloidal magnetic states. This is particularly true in epitaxial thin film geometries, where strain and interface…

Owing to the experimental discovery of magnetic skyrmions stabilized by the Dzyaloshinskii-Moriya and/or dipolar interactions in thin films, there is a recent upsurge of interest in magnetic skyrmions with antiferromagnetic spins in order…

材料科学 · 物理学 2020-08-04 K. Chen , D. Lott , A. Philippi-Kobs , M. Weigand , C. Luo , F. Radu

A mgnetic bimeron is an in-plane topological counterpart of a magnetic skyrmion. Despite the topological equivalence, their statics and dynamics could be distinct, making them attractive from the perspectives of both physics and spintronic…

介观与纳米尺度物理 · 物理学 2020-11-16 X. Li , L. Shen , Y. Bai , J. Wang , X. Zhang , J. Xia , M. Ezawa , O. A. Tretiakov , X. Xu , M. Mruczkiewicz , M. Krawczyk , Y. Xu , R. F. L. Richard , R. W. Chantrell , Y. Zhou