Efficient Spin Torques in Antiferromagnetic CoO/Pt Quantified by Comparing Field- and Current-Induced Switching
Efficient Spin Torques in Antiferromagnetic CoO/Pt Quantified by Comparing Field- and Current-Induced Switching
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DOI：
10.1103/physrevlett.125.077201
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发表时间：
2020-08-10
影响因子：
8.6
通讯作者：
Klaeui, M.
中科院分区：
文献类型：
--
作者：
Baldrati, L.;Schmitt, C.;Klaeui, M.
我们在共线绝缘反铁磁CoO/Pt中实现了电流感生开关，具有四重面内磁各向异性。这是测量电自旋霍尔磁阻和证实磁场诱导的自旋翻转过渡的CoO层。通过施加电流脉冲和磁场，我们量化了作用电流感应扭矩的效率，并估计电流场当量比为4 × 10（-11）TA（-1）m（2）。Neel矢量最终状态（n垂直于j）是符合热磁弹性切换机制的负磁弹性常数的CoO。
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.