Magnetization switching induced by spin-orbit torque from Co2MnGa magnetic Weyl semimetal thin films

被引：32

作者：

Tang, Ke ^{[1
,2
]}

Wen, Zhenchao ^{[1
]}

Lau, Yong-Chang ^{[3
,4
]}

Sukegawa, Hiroaki ^{[1
]}

Seki, Takeshi ^{[3
,4
]}

Mitani, Seiji ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058577, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan

来源：

APPLIED PHYSICS LETTERS | 2021年 / 118卷 / 06期

基金：

日本学术振兴会;

关键词：

Compendex;

D O I：

10.1063/5.0037178

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This study reports the magnetization switching induced by spin-orbit torque (SOT) from the spin current generated in Co2MnGa magnetic Weyl semimetal (WSM) thin films. We deposited epitaxial Co2MnGa thin films with a highly B2-ordered structure on MgO(001) substrates. The SOT was characterized by harmonic Hall measurements in a Co2MnGa/Ti/CoFeB heterostructure, and a relatively large spin Hall efficiency (xi (SH)) of -7.8% was obtained. The SOT-induced magnetization switching of the perpendicularly magnetized CoFeB layer was further demonstrated using the structure. The symmetry of second harmonic signals, thickness dependence of xi (SH), and shift of anomalous Hall loops under applied currents were also investigated. This study not only contributes to the understanding of the mechanisms of spin-current generation from magnetic-WSM-based heterostructures but also paves the way for the applications of magnetic WSMs in spintronic devices.

引用

页数：6

共 31 条

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