Electrical and optical characterizations of spin-orbit torque
Electrical and optical characterizations of spin-orbit torque
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DOI：
10.1063/5.0045091
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发表时间：
2021-02
影响因子：
4
通讯作者：
Han-Pin Huang;Hao Wu;Tian Yu;Quanjun Pan;Bingqian Dai;Armin Razavi;Kin Wong;B. Cui;S. Chong;Di Wu;Kang L. Wang
中科院分区：
文献类型：
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作者：
Han-Pin Huang;Hao Wu;Tian Yu;Quanjun Pan;Bingqian Dai;Armin Razavi;Kin Wong;B. Cui;S. Chong;Di Wu;Kang L. Wang
为了进一步降低自旋轨道力矩器件的能耗，精确地量化不同材料和结构中的自旋轨道力矩（SOT）是至关重要的。在这项工作中，重金属/铁磁体和重金属/亚铁磁体异质结构作为模型系统，比较的SOT表征的电学和光学方法，这是基于反常霍尔效应和磁光克尔效应，分别。结果发现，这两种方法产生一致的SOT强度的电流驱动的磁化开关测量和谐波测量。我们的研究结果表明，光学方法是一个可行的和可靠的工具来研究SOT，这是一个强有力的方法，以发展基于绝缘体的磁系统在未来。
To further reduce the energy consumption in spin–orbit torque devices, it is crucial to precisely quantify the spin–orbit torque (SOT) in different materials and structures. In this work, heavy metal/ferromagnet and heavy metal/ferrimagnet heterostructures are employed as the model systems to compare the electrical and optical methods for the SOT characterization, which are based on the anomalous Hall effect and the magneto-optical Kerr effect, respectively. It is found that both methods yield the consistent SOT strength for the current-driven magnetization switching measurements and the harmonic measurements. Our results suggest that the optical method is a feasible and reliable tool to investigate SOT, which is a powerful way to develop insulator-based magnetic systems in the future.