Efficient Spin Torques in Antiferromagnetic CoO/Pt Quantified by Comparing Field- and Current-Induced Switching

被引：43

作者：

Baldrati, L. ^{[1
]}

Schmitt, C. ^{[1
]}

Gomonay, O. ^{[1
]}

Lebrun, R. ^{[1
,2
]}

Ramos, R. ^{[3
]}

Saitoh, E. ^{[3
,4
,5
,6
,7
]}

Sinova, J. ^{[1
,8
,9
]}

Klaeui, M. ^{[1
,9
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[2] Univ Paris Saclay, Univ Paris Sud, CNRS, Thales,Unite Mixte Phys, F-91767 Palaiseau, France

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

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

[5] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

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

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

[8] Acad Sci Czech Republ, Inst Phys, Prague 11720, Czech Republic

[9] Grad Sch Excellence Mat Sci Mainz, D-55128 Mainz, Germany

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 07期

基金：

欧洲研究理事会;

关键词：

MNO;

D O I：

10.1103/PhysRevLett.125.077201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We achieve current-induced switching in collinear insulating antiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This is measured electrically by spin Hall magnetoresistance and confirmed by the magnetic field-induced spin-flop transition of the CoO layer. By applying current pulses and magnetic fields, we quantify the efficiency of the acting current-induced torques and estimate a currentfield equivalence ratio of 4 x 10(-11) T A(-1) m(2). The Neel vector final state (n perpendicular to j) is in line with a thermomagnetoelastic switching mechanism for a negative magnetoelastic constant of the CoO.

引用

页数：6

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