Vertical spin transport in Al with Pd/Al/Ni80Fe20 trilayer films at room temperature by spin pumping

Vertical spin transport in Al with Pd/Al/Ni80Fe20 trilayer films at room temperature by spin pumping
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DOI:
10.1038/srep01739
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发表时间:
2013-04-26
期刊:
影响因子:
4.6
通讯作者:
Shiraishi, Masashi
Shiraishi, Masashi
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kitamura, Yuta;Shikoh, Eiji;Ando, Yuichiro;Shinjo, Teruya;Shiraishi, Masashi

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自旋泵浦使纯自旋电流在Pd/Al/Ni80Fe20(Py)三层膜中的垂直输运成为可能,其中Py充当自旋电池。注入到Al中的自旋电流流经Al到达PD,由于PD中的反向自旋霍尔效应而产生电动势。电动势随着铝层厚度的增加而减小。基于Tserkovnyak等人的理论,一个简单的模型可以估计61 nm Al中垂直自旋输运的自旋相干性。这种相对较短的相干归因于Al/Py界面的粗糙导致自旋泵浦效率的降低。
Spin pumping enables the vertical transport of pure spin current through Al in a Pd/Al/Ni80Fe20(Py) trilayer film, in which the Py acts as a spin battery. The spin current injected into the Al flows through the Al to reach the Pd, resulting in the generation of electromotive forces due to the inverse spin Hall effect in the Pd. The electromotive forces decreased with increasing thickness of the Al layer. A simple model based on the theory by Tserkovnyak et al., allows an estimation of the spin coherence of the vertical spin transport in the Al of 61 nm. This comparatively short coherence is attributed to a reduction in spin pumping efficiency because of the roughness of the Al/Py interface.
DOI: 10.1103/physrevb.67.085319
发表时间: 2003-02-15
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