DC voltages in Py and Py/Pt under ferromagnetic resonance
DC voltages in Py and Py/Pt under ferromagnetic resonance
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DOI：
10.7567/apex.7.013002
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发表时间：
2013
影响因子：
2.3
通讯作者：
Lin Chen;S. Ikeda;F. Matsukura;H. Ohno
中科院分区：
文献类型：
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作者：
Lin Chen;S. Ikeda;F. Matsukura;H. Ohno
我们在铁磁共振下测量了坡莫合金(Py)单层和Py/Pt双层膜的直流电压。观测到的电压可以分解为对称分量和反对称分量。首先，我们证实了对于Py，对称分量由平面霍尔效应(Phe)产生，而反对称分量由反常霍尔效应产生。然后，我们考虑了Py/Pt中的逆自旋霍尔效应(ISHE)引起的直流电压叠加了电磁场效应，得出了ISHE对对称分量的贡献也比Phe小2.5倍的结论。我们的结果表明，在对自旋泵浦产生的直流电压进行定量分析时，应注意电磁场效应。
We measure dc voltages in a permalloy (Py) single layer and a Py/Pt bilayer under ferromagnetic resonance. The observed voltages can be decomposed into symmetric and antisymmetric components. First, we confirm for Py that the symmetric component results from the planar Hall effect (PHE), whereas the antisymmetric one results from the anomalous Hall effect. Then, we consider the dc voltage induced by the inverse spin Hall effect (ISHE) in Py/Pt superimposing the galvanomagnetic effects, and conclude that the voltage induced by ISHE also contributes to the symmetric component with about 2.5 times smaller magnitude than that by PHE. Our results indicate that one should be careful about the galvanomagnetic effects in the quantitative analyses of dc voltage induced by spin pumping.