Decker M M, Wörnle M S, Meisinger A, Vogel M, Körner H S, Shi G Y, Song C, Kronseder M, Back C H
Department of Physics, Regensburg University, 93053 Regensburg, Germany.
Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Phys Rev Lett. 2017 Jun 23;118(25):257201. doi: 10.1103/PhysRevLett.118.257201. Epub 2017 Jun 22.
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.
我们报告了基于高分辨率克尔显微镜的时间分辨频闪实验中，自旋轨道扭矩诱导垂直磁化的Pt/Co元件切换的实验观察结果。通过向双层注入亚纳秒电流脉冲，同时施加静态面内磁偏置场来诱导磁化动力学。观察到在几十纳秒的时间尺度上具有高度可重复的均匀切换。只有当包括类场扭矩项以及由有限温度介导的Dzyaloshinskii-Moriya相互作用时，我们的发现才能通过微磁学建模得到证实。
