Universality of the spin pumping in metallic bilayer films
Universality of the spin pumping in metallic bilayer films
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DOI：
10.1063/1.3571556
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发表时间：
2011-03
影响因子：
4
通讯作者：
T. Yoshino;K. Ando;K. Harii;H. Nakayama;Y. Kajiwara;E. Saitoh
中科院分区：
文献类型：
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作者：
T. Yoshino;K. Ando;K. Harii;H. Nakayama;Y. Kajiwara;E. Saitoh
我们显示了一个明确的指导方针，产生一个大的自旋电流使用的自旋泵在金属双层膜。我们使用逆自旋霍尔效应（ISHE）测量了Ni 1 −xFex/Pt双层膜中自旋泵浦产生的自旋电流。基于自旋抽运模型的计算很好地再现了ISHE信号的幅度。结果表明，自旋电流的幅值一般由饱和磁化强度、附加阻尼常数和磁化进动立体角的乘积决定。
We show a clear guideline for generating a large spin current using the spin pumping in metallic bilayer films. We measured spin currents generated by the spin pumping in Ni1−xFex/Pt bilayer films using the inverse spin-Hall effect (ISHE). The magnitude of the ISHE signals are well reproduced by a calculation based on the model of the spin pumping. The result shows that the amplitude of a spin current is universally determined by the product of the saturation magnetization, the additional damping constant, and the solid angle of the magnetization precession.