Dependence of spin-pumping spin Hall effect measurements on layer thicknesses and stacking order
Dependence of spin-pumping spin Hall effect measurements on layer thicknesses and stacking order
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DOI：
10.1103/physrevb.88.064414
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发表时间：
2013-05
影响因子：
3.7
通讯作者：
V. Vlaminck;J. Pearson;S. Bader;A. Hoffmann
中科院分区：
文献类型：
--
作者：
V. Vlaminck;J. Pearson;S. Bader;A. Hoffmann
利用宽带铁磁共振方法研究了铁磁（F）/非磁（N）双层膜中自旋泵反自旋霍尔效应和各向异性磁阻效应产生的电压.改变非磁性层厚度使得能够确定Pd中的自旋扩散长度为5.5 +/-0.5nm。我们还观察到一个系统的变化时，颠倒的F/N双层，这是定性的自旋霍尔效应的预期一致的堆叠顺序的电压线型。然而，即使在独立校准的旋进角，系统的定量分析数据与自旋霍尔效应的差异仍然存在。
Voltages generated from inverse spin Hall and anisotropic magneto-resistance effects via spin pumping in ferromagnetic (F)/non-magnetic (N) bilayers are investigated by means of a broadband ferromagnetic resonance approach. Varying the non-magnetic layer thickness enables the determination of the spin diffusion length in Pd of 5.5 +/- 0.5 nm. We also observe a systematic change of the voltage lineshape when reversing the stacking order of the F/N bilayer, which is qualitatively consistent with expectations from spin Hall effects. However, even after independent calibration of the precession angle, systematic quantitative discrepancies in analyzing the data with spin Hall effects remain.