Realization and Current-Driven Dynamics of Fractional Hopfions and Their Ensembles in a Helimagnet FeGe

被引：16

作者：

Yu, Xiuzhen ^{[1
]}

Liu, Yizhou ^{[1
]}

Iakoubovskii, Konstantin V. ^{[1
]}

Nakajima, Kiyomi ^{[1
]}

Kanazawa, Naoya ^{[2
]}

Nagaosa, Naoto ^{[1
,2
]}

Tokura, Yoshinori ^{[1
,2
,3
]}

机构：

[1] RIKEN Ctr Emergent Matter Sci CEMS, Wako 3510198, Japan

[2] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[3] Univ Tokyo, Tokyo Coll, Tokyo 1138656, Japan

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 20期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

current-driven dynamics; helimagnet; hopfion; Lorentz transmission electron microscopy; micromagnetic simulation; ROOM-TEMPERATURE; SKYRMIONS; TRANSPORT;

D O I：

10.1002/adma.202210646

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

3D topological spin textures-hopfions-are predicted in helimagnetic systems but are not experimentally confirmed thus far. By utilizing an external magnetic field and electric current in the present study, 3D topological spin textures are realized, including fractional hopfions with nonzero topological index, in a skyrmion-hosting helimagnet FeGe. Microsecond current pulses are employed to control the dynamics of the expansion and contraction of a bundle composed of a skyrmion and a fractional hopfion, as well as its current-driven Hall motion. This research approach has demonstrated the novel electromagnetic properties of fractional hopfions and their ensembles in helimagnetic systems.

引用

页数：9

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