Anomalous Hall effect in Mn1.5Ga/Ta and Mn1.5Ga/Pt bilayers: Modification from spin-orbit coupling of heavy metals
Anomalous Hall effect in Mn1.5Ga/Ta and Mn1.5Ga/Pt bilayers: Modification from spin-orbit coupling of heavy metals
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Mn1.5Ga/Ta 和 Mn1.5Ga/Pt 双层中的反常霍尔效应：重金属自旋轨道耦合的修改
DOI：
10.1103/physrevb.93.060406
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发表时间：
2016-02-18
影响因子：
3.7
通讯作者：
Jiang, Y.
中科院分区：
文献类型：
--
作者：
Meng, K. K.;Miao, J.;Jiang, Y.
报道了Mn_（1.5）Ga/Ta和Mn_（1.5）Ga/Pt双层膜中重金属强自旋轨道耦合（SOC）修饰的反常霍尔效应（AHE）的系统测量结果。结果与Mn1.5Ga/Cu中具有弱SOC的AHE进行了比较。我们使用了涉及多个竞争散射机制的标度来区分修改后的AHE的不同贡献。结垢分析表明，Mn 1.5Ga/Cu中AHE的来源不同于Mn 1.5Ga/Ta和Mn 1.5Ga/Pt中的AHE。直接观察自旋-轨道力矩诱导的磁化翻转证实了结果是Mn 1.5Ga的AHE和重金属的自旋霍尔效应的组合。
We report systematic measurements of anomalous Hall effect (AHE) in Mn1.5Ga/Ta and Mn1.5Ga/Pt bilayers modified by strong spin-orbit coupling (SOC) of the heavy metals. The results are compared with the AHE in Mn1.5Ga/Cu with weak SOC. We have used a scaling involving multiple competing scattering mechanisms to distinguish different contributions to the modified AHE. The scaling analysis reveals that the origin of the modified AHE in Mn1.5Ga/Cu is different from those in Mn1.5Ga/Ta and Mn1.5Ga/Pt. The direct observation of spin-orbit torque induced magnetization switching confirms that the result is a combination of the AHE of Mn1.5Ga and spin Hall effect of the heavy metals.