Time Resolved Measurements of the Switching Trajectory of Pt/Co Elements Induced by Spin-Orbit Torques
Time Resolved Measurements of the Switching Trajectory of Pt/Co Elements Induced by Spin-Orbit Torques
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DOI：
10.1103/physrevlett.118.257201
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发表时间：
2017-06-22
影响因子：
8.6
通讯作者：
Back, C. H.
中科院分区：
文献类型：
--
作者：
Decker, M. M.;Woernle, M. S.;Back, C. H.
我们报告了在基于高分辨率克尔显微镜的时间分辨频闪实验中垂直磁化 Pt/Co 元件的自旋轨道扭矩引起的切换的实验观察。通过将亚纳秒电流脉冲注入双层，同时施加静态面内磁偏置场来诱发磁化动力学。观察到在几十纳秒的时间尺度上高度可重复的均匀切换。仅当包含类场扭矩项以及由有限温度介导的 Dzyaloshinskii-Moriya 相互作用时，我们的研究结果才能使用微磁模型得到证实。
We report the experimental observation of spin-orbit torque induced switching of perpendicularly magnetized Pt/Co elements in a time resolved stroboscopic experiment based on high resolution Kerr microscopy. Magnetization dynamics is induced by injecting subnanosecond current pulses into the bilayer while simultaneously applying static in-plane magnetic bias fields. Highly reproducible homogeneous switching on time scales of several tens of nanoseconds is observed. Our findings can be corroborated using micromagnetic modeling only when including a fieldlike torque term as well as the Dzyaloshinskii-Moriya interaction mediated by finite temperature.