Magnetization switching driven by current-induced torque from weakly spin-orbit coupled Zr

被引：55

作者：

Zheng, Z. C. ^{[1
]}

Guo, Q. X. ^{[1
,2
,3
]}

Jo, D. ^{[4
]}

Go, D. ^{[4
,9
,10
,11
,12
]}

Wang, L. H. ^{[5
]}

Chen, H. C. ^{[6
]}

Yin, W. ^{[6
]}

Wang, X. M. ^{[7
]}

Yu, G. H. ^{[1
]}

He, W. ^{[2
,3
]}

Lee, H-W ^{[4
]}

Teng, J. ^{[1
]}

Zhu, T. ^{[2
,3
,6
,8
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Pohang Univ Sci & Technol, Dept Phys, Pohang 37673, South Korea

[5] Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China

[6] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China

[7] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Adv Steel Technol, Beijing 100083, Peoples R China

[8] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China

[9] Pohang Univ Sci & Technol, Basic Sci Res Inst, Pohang 37673, South Korea

[10] Forschungszentrum Julich, Peter Grunberg Inst, D-52428 Julich, Germany

[11] Forschungszentrum Julich, Inst Adv Simulat, D-52428 Julich, Germany

[12] JARA, D-52428 Julich, Germany

来源：

PHYSICAL REVIEW RESEARCH | 2020年 / 2卷 / 01期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Current-induced magnetization switching (CIMS) via the spin-orbit torque is technologically important for applications of spintronic devices. Existing experimental studies are focused on 5d heavy metals with large spin-orbit coupling but theoretical studies indicate that 3d or 4d light metals with weak spin-orbit coupling may also generate sizable torque through the strong orbital Hall effect. However; CIMS has seldom been experimentally demonstrated using 3d or 4d light metals. Here; we report sizable current-induced torque and a robust CIMS in weakly spin-orbit coupled Zr based perpendicular magnetized multilayers. Current-induced effective torque field changes its sign as the Zr layer thickness varies; indicating the competition of multiple effects. Possible roles of the orbital Hall effect in the competition are discussed. Our findings widen the material scope of the CIMS and imply possible applications of the orbital Hall effect. © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title; journal citation; and DOI;

D O I：

10.1103/PhysRevResearch.2.013127

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Current-induced magnetization switching (CIMS) via the spin-orbit torque is technologically important for applications of spintronic devices. Existing experimental studies are focused on 5d heavy metals with large spinorbit coupling but theoretical studies indicate that 3d or 4d light metals with weak spin-orbit coupling may also generate sizable torque through the strong orbital Hall effect. However, CIMS has seldom been experimentally demonstrated using 3d or 4d light metals. Here, we report sizable current-induced torque and a robust CIMS in weakly spin-orbit coupled Zr based perpendicular magnetized multilayers. Current-induced effective torque field changes its sign as the Zr layer thickness varies, indicating the competition of multiple effects. Possible roles of the orbital Hall effect in the competition are discussed. Our findings widen the material scope of the CIMS and imply possible applications of the orbital Hall effect.

引用

页数：8

共 36 条

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