Antidamping-Torque-Induced Switching in Biaxial Antiferromagnetic Insulators

被引：274

作者：

Chen, X. Z. ^{[1
]}

Zarzuela, R. ^{[2
]}

Zhang, J. ^{[3
,4
]}

Song, C. ^{[1
]}

Zhou, X. F. ^{[1
]}

Shi, G. Y. ^{[1
]}

Li, F. ^{[1
]}

Zhou, H. A. ^{[5
,6
]}

Jiang, W. J. ^{[5
,6
]}

Pan, F. ^{[1
]}

Tserkovnyak, Y. ^{[2
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, MOE, Key Lab Adv Mat, Beijing 100084, Peoples R China

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[3] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China

[4] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Hubei, Peoples R China

[5] Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[6] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 20期

基金：

国家重点研发计划;

关键词：

AUGMENTED-WAVE METHOD; SPIN;

D O I：

10.1103/PhysRevLett.120.207204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the current-induced switching of the Neel order in NiO(001)/Pt heterostractures, which is manifested electrically via the spin Hall magnetoresistance. Significant reversible changes in the longitudinal and transverse resistances are found at room temperature for a current threshold lying in the range of 10(7) A/cm(2). The order-parameter switching is ascribed to the antiferromagnetic dynamics triggered by the (current-induced) antidamping torque, which orients the Neel order towards the direction of the writing current. This is in stark contrast to the case of antiferromagnets such as Mn2Au and CuMnAs, where fieldlike torques induced by the Edelstein effect drive the Neel switching, therefore resulting in an orthogonal alignment between the Neel order and the writing current. Our findings can be readily generalized to other biaxial antiferromagnets, providing broad opportunities for all-electrical writing and readout in antiferromagnetic spintronics.

引用

页数：6

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