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

被引：41
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.
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页数：6
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