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Magnetic skyrmions are chiral spin structures with non-trivial topology that comprise two-dimensional quasi-particles and are promising information carriers for data storage and processing devices. Skyrmion lattices in magnetic thin films…

We present long-wavelength neutron diffraction data measured on both single crystal and polycrystalline samples of the skyrmion host material Cu$_{2}$OSeO$_{3}$. We observe magnetic satellites around the $(0\bar{1}1)$ diffraction peak not…

In chiral magnets, localized topological magnetic whirls, magnetic skyrmions, can be moved by spin polarized electric currents. Upon increasing the current strength, with prospects for high-speed skyrmion motion for spintronics applications…

介观与纳米尺度物理 · 物理学 2020-06-22 Jan Masell , Davi R. Rodrigues , Ben F. McKeever , Karin Everschor-Sitte

The magnetic field-driven evolution of chiral spin textures in thin helimagnet nanodisk with varied size are investigated by means of Monte Carlo simulation. It is demonstrated that the complex spin texture may simply be regarded as the…

介观与纳米尺度物理 · 物理学 2013-02-05 Haifeng Du , Wei Ning , Mingliang Tian , Yuheng Zhang

Multiple-$Q$ magnetic orderings represent magnetic textures composed of superpositions of multiple spin density waves or spin spirals, as represented by skyrmion crystals and hedgehog lattices. Such magnetic orderings have been observed in…

强关联电子 · 物理学 2022-05-18 Yasuyuki Kato , Yukitoshi Motome

Thin magnetic films with Dzyaloshinskii-Moriya interactions are known to host skyrmion crystals, which typically have a hexagonal lattice structure. We investigate skyrmion-lattice configurations in synthetic antiferromagnets, i.e., a…

介观与纳米尺度物理 · 物理学 2019-08-14 Etienne van Walsem , Rembert A. Duine , Juriaan Lucassen , Reinoud Lavrijsen , Henk J. M. Swagten

In this work, we develop a theory of (meta)stable states of N\'eel-type skyrmions in weak nonuniform magnetic fields. We claim an Ansatz for modeling the non-symmetric magnetization that can be implied for both analytics and numerical…

介观与纳米尺度物理 · 物理学 2024-03-06 S. S. Apostoloff , E. S. Andriyakhina , I. S. Burmistrov

We present a theory of the electron smectic fixed point of the stripe phases of doped layered Mott insulators. We show that in the presence of a spin gap three phases generally arise: (a) a smectic superconductor, (b) an insulating stripe…

强关联电子 · 物理学 2009-10-31 Victor J. Emery , Eduardo Fradkin , Steven A. Kivelson , Tom C. Lubensky

With the rapidly expanded field of two-dimensional(2D) magnetic materials, the frustrated magnetic skyrmions are attracting growing interest recently. Here, based on hexagonal close-packed (HCP) lattice of $J_1$-$J_2$ Heisenberg spins…

计算物理 · 物理学 2024-01-23 Hongliang Hu , Zhong Shen , Zheng Chen , Xiaoping Wu , Tingting Zhong , Changsheng Song

Magnetic skyrmions are topologically protected nanoscale spin textures exhibiting fascinating physical behaviors. Recent observations of room temperature N\'eel-type skyrmions in magnetic multilayer films are an important step towards their…

介观与纳米尺度物理 · 物理学 2018-10-19 Senfu Zhang , Junwei Zhang , Yan Wen , Eugene M. Chudnovsky , Xixiang Zhang

Tailored magnetic multilayers (MMLs) provide skyrmions with enhanced thermal stability, leading to the possibility of skyrmion-based devices for room temperature applications. At the same time, the search for additional stable topological…

介观与纳米尺度物理 · 物理学 2023-05-19 Runze Chen , Yu Li , William Griggs , Yuzhe Zang , Vasilis F. Pavlidis , Christoforos Moutafis

Magnetic skyrmions, topologically stabilized chiral magnetic textures with particle-like properties have so far primarily been studied statically. Here, we experimentally investigate the dynamics of skyrmion ensembles in metallic thin film…

介观与纳米尺度物理 · 物理学 2024-03-14 Klaus Raab , Maurice Schmitt , Maarten A. Brems , Jan Rothörl , Fabian Kammerbauer , Sachin Krishnia , Mathias Kläui , Peter Virnau

We numerically investigate two-dimensional systems of hard rectangles at constant pressure through extensive hard-particle Monte Carlo simulations. We determine the complete phase diagram as a function of packing fraction and aspect ratio,…

软凝聚态物质 · 物理学 2025-05-15 Denis Dertli , Thomas Speck

Dynamics of magnetic skyrmions in hybrid ferromagnetic films harbors novel physical phenomena and holds promise for technological applications. In this work, we discuss the behavior of magnetic skyrmions when coupled to superconducting…

Ferrimagnetic Fe/Gd multilayers host maze-like stripe domains that transform into a disordered bubble/skyrmion lattice under out-of-plane magnetic fields at ambient temperature. Femtosecond magneto-optics distinguishes these textures via…

Skyrmions are chiral magnetic textures that have immense potential for applications in spintronic devices. However, their formation is quite challenging and necessitates a subtle balance of the magnetic interactions at play. Here, we study…

Small angle neutron scattering measurements have been performed to study the thermodynamic stability of skyrmion-lattice phases in Cu$_2$OSeO$_3$. We found that the two distinct skyrmion-lattice phases [SkX(1) and SkX(2) phases] can be…

Topological spin textures such as skyrmions hold high potential for use as magnetically active elements in diverse near-future applications. While skyrmions in metallic multilayers attract great attention in this context, unleashing the…

Magnetic skyrmions are nontrivial spin textures which resist external perturbations, being promising candidates for the next generation recording devices. Nevertheless, a major challenge in realizing skyrmion-based devices is the…

Topological swirling spin textures, such as skyrmions and merons, have recently attracted much attention as a unique building block for high-density magnetic information devices. The controlled transformation among different types of such…

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