Spin-torque ferromagnetic resonance in electrochemically etched metallic device
Spin-torque ferromagnetic resonance in electrochemically etched metallic device
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DOI：
10.35848/1882-0786/ab8347
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发表时间：
2020-04
影响因子：
2.3
通讯作者：
Ryuki Suzuki;Satoshi Haku;Hiroki Hayashi;K. Ando
中科院分区：
文献类型：
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作者：
Ryuki Suzuki;Satoshi Haku;Hiroki Hayashi;K. Ando
我们演示了使用自旋-转矩铁磁共振（ST-FMR）结合Fe/Pt双分子层的电化学刻蚀来量化自旋-轨道转矩效率。利用离子液体对ST-FMR器件进行电化学刻蚀，可以通过改变铁磁层厚度来研究自旋轨道有效场和奥斯特场。这样就可以解开类场（FL）有效场和奥斯特场的纠缠，从而确定单个设备中的类阻尼和FL扭矩效率。这一强大的技术为探索奇异材料和系统中的自旋轨道转矩提供了可能。
We demonstrate the quantification of spin–orbit torque efficiencies using spin-torque ferromagnetic resonance (ST-FMR) combined with electrochemical etching of a Fe/Pt bilayer. The electrochemical etching of the ST-FMR device using an ionic liquid enables to study spin–orbit effective fields, as well as an Oersted field, by varying the ferromagnetic-layer thickness. This allows to disentangle the field-like (FL) effective field and Oersted field, enabling to determine the damping-like and FL torque efficiencies in the single device. This robust technique opens a possibility to explore the spin–orbit torques in exotic materials and systems.