论文标题
外延NIMNSB膜中的生长，应变和旋转轨道扭矩溅射在GAAS上
Growth, strain and spin orbit torques in epitaxial NiMnSb films sputtered on GaAs
论文作者
论文摘要
我们报告了在商业上可用的Epi-Ready GAAS基板上的外延NIMNSB膜中电流引起的自旋扭矩。 NIMNSB是通过使用优化参数从三个目标共同分解来生长的。将薄膜加工到微尺度棒中，以执行电流诱导的自旋刺测测量。微波电流激发磁化动力学，并测量沿条形的电压来分析电流诱导的扭矩的对称性。我们发现，旋转扭矩的提取的对称性与四扭曲的半身晶体中自旋轨道相互作用预期的对称性匹配。在所有表征的所有样品中都观察到了野外和阻尼状的扭矩，并且电流诱导的扭矩的效率与铁磁金属/重金属双层的扭矩相当。
We report current-induced spin torques in epitaxial NiMnSb films on a commercially available epi-ready GaAs substrate. The NiMnSb was grown by co-sputtering from three targets using optimised parameter. The films were processed into micro-scale bars to perform current-induced spin-torque measurements. Magnetic dynamics were excited by microwave currents and electric voltages along the bars were measured to analyse the symmetry of the current-induced torques. We found that the extracted symmetry of the spin torques matches those expected from spin-orbit interaction in a tetragonally distorted half-Heusler crystal. Both field-like and damping-like torques are observed in all the samples characterised, and the efficiency of the current-induced torques is comparable to that of ferromagnetic metal/heavy metal bilayers.
