Kavli Institute of NanoScience, Delft University of Technology, 2628 CJ Delft, The Netherlands.
Phys Rev Lett. 2013 May 24;110(21):217602. doi: 10.1103/PhysRevLett.110.217602. Epub 2013 May 23.
The spin current pumped by a precessing ferromagnet into an adjacent normal metal has a constant polarization component parallel to the precession axis and a rotating one normal to the magnetization. The former is now routinely detected as a dc voltage induced by the inverse spin Hall effect (ISHE). Here we compute ac ISHE voltages much larger than the dc signals for various material combinations and discuss optimal conditions to observe the effect. The backflow of spin is shown to be essential to distill parameters from measured ISHE voltages for both dc and ac configurations.
通过进动铁磁体向相邻正常金属中注入的自旋流具有一个与进动轴平行的恒定极化分量和一个垂直于磁化的旋转分量。前者现在通常被作为逆自旋霍尔效应（ISHE）感应的直流电压来检测。在这里，我们针对各种材料组合计算了比直流信号大得多的交流 ISHE 电压，并讨论了观察该效应的最佳条件。结果表明，自旋的回流对于从直流和交流两种配置的测量 ISHE 电压中提取参数是必不可少的。
