Inverse Spin-Hall Effect Induced by Spin Pumping in Various Metals
Inverse Spin-Hall Effect Induced by Spin Pumping in Various Metals
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DOI：
10.1109/tmag.2010.2041904
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发表时间：
2010-06-01
影响因子：
2.1
通讯作者：
Saitoh, Eiji
中科院分区：
文献类型：
--
作者：
Ando, Kazuya;Kajiwara, Yosuke;Saitoh, Eiji
在室温下，利用自旋泵在Ni（81）Fe（19）/N（N = Pt，Pd，Ag，Au）薄膜中观察到了自旋电流向电压转换的逆自旋霍尔效应（ISHE）.由Ni（81）Fe（19）层中的磁化旋进驱动的自旋泵浦将自旋电流注入到该层中，从而经由ISHE在该层的边缘之间产生电势差。我们在Ni（81）Fe（19）薄膜中发现了铁磁共振条件下的共振电动势信号。用简单的洛伦兹函数可以很好地再现电动势信号的频谱形状，这与自旋抽运引起的ISHE的预测是一致的。在Ni（81）Fe（19）体系中观察到ISHE信号典型地增强，这表明自旋-轨道相互作用在由自旋泵浦引起的ISHE中起关键作用。
The inverse spin-Hall effect (ISHE), conversion of spin currents into electric voltage, was observed in Ni(81)Fe(19)/N (N = Pt, Pd, Ag, and Au) films using the spin pumping at room temperature. The spin pumping driven by magnetization precession in the Ni(81)Fe(19) layer injects a spin current into the layer, giving rise to an electric potential difference between the edges of the layer via ISHE. We found resonant electromotive force signals at the ferromagnetic resonance condition in the Ni(81)Fe(19) films. The spectral shape of the electromotive force signals are well reproduced by simple Lorentz functions, which is consistent with the prediction of ISHE induced by the spin pumping. The ISHE signal was observed to typically be enhanced in the Ni(81)Fe(19) system, showing the crucial role of the spin-orbit interaction in ISHE induced by the spin pumping.