Noncentrosymmetric Magnets Hosting Magnetic Skyrmions
Noncentrosymmetric Magnets Hosting Magnetic Skyrmions
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DOI：
10.1002/adma.201603227
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发表时间：
2017-07-05
影响因子：
29.4
通讯作者：
Tokura, Yoshinori
中科院分区：
文献类型：
--
作者：
Kanazawa, Naoya;Seki, Shinichiro;Tokura, Yoshinori
斯格明子的概念最初由托尼·斯凯尔姆（Tony Skyrme）在粒子物理学领域提出，现已在凝聚态物理学中广泛用于描述各种拓扑序。磁性材料中的斯格明子最近受到特别关注。它们代表具有纳米粒子特征的涡旋状自旋结构，并产生源于其拓扑性质的迷人物理特性。本文综述了一系列含有斯格明子的非中心对称铁磁体：B20 金属、Cu2OSeO3、Co-Zn-Mn 合金和 GaV4S8，其中 Dzyaloshinskii-Moriya 相互作用在斯格明子自旋织构的稳定中起着关键作用。它们的拓扑自旋排列和随之而来的电磁场在金属和绝缘体中产生了输运和磁电特性的显着特征，例如拓扑霍尔效应、斯格明子的高效电驱动和多铁性行为。这种电可控性和纳米粒子性质凸显了磁性斯格明子作为具有优异能源效率的高密度磁存储设备的潜在信息载体。
The concept of a skyrmion, which was first introduced by Tony Skyrme in the field of particle physics, has become widespread in condensed matter physics to describe various topological orders. Skyrmions in magnetic materials have recently received particular attention; they represent vortex-like spin structures with the character of nanometric particles and produce fascinating physical properties rooted in their topological nature. Here, a series of noncentrosymmetric ferromagnets hosting skyrmions is reviewed: B20 metals, Cu2OSeO3, Co-Zn-Mn alloys, and GaV4S8, where Dzyaloshinskii-Moriya interaction plays a key role in the stabilization of skyrmion spin texture. Their topological spin arrangements and consequent emergent electromagnetic fields give rise to striking features in transport and magnetoelectric properties in metals and insulators, such as the topological Hall effect, efficient electric-drive of skyrmions, and multiferroic behavior. Such electric controllability and nanometric particle natures highlight magnetic skyrmions as a potential information carrier for high-density magnetic storage devices with excellent energy efficiency.