Noncentrosymmetric Magnets Hosting Magnetic Skyrmions

被引:175
作者
Kanazawa, Naoya [1 ]
Seki, Shinichiro [2 ]
Tokura, Yoshinori [1 ,2 ]
机构
[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
[2] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan
关键词
REAL-SPACE OBSERVATION; ROOM-TEMPERATURE; LATTICE; DYNAMICS; PHASE; ELECTROMAGNONS; STATES; MAGNETORESISTANCE; TRANSITION; DICHROISM;
D O I
10.1002/adma.201603227
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
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页数:19
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