Perpendicularly Polarized Spin Hall Effects Induced by Spin-Dependent Scattering in Ferromagnetic Metals
Perpendicularly Polarized Spin Hall Effects Induced by Spin-Dependent Scattering in Ferromagnetic Metals
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DOI：
10.7566/jpsj.91.083701
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发表时间：
2022-01
影响因子：
1.7
通讯作者：
Y. Yahagi;D. Miura;A. Sakuma
中科院分区：
文献类型：
--
作者：
Y. Yahagi;D. Miura;A. Sakuma
铁磁体中的自旋流具有多种功能。我们评估了铁磁金属中磁性杂质散射的外禀自旋霍尔效应。我们表明，自旋相关散射能够提供一种垂直于磁化方向极化的高自旋流，并且在中等电导率区域是一种主要机制。我们发现自旋守恒通道和自旋翻转通道的叠加产生了自旋流。这些发现表明，优化合金成分是控制自旋霍尔效应的一种有效策略。
Spin currents in ferromagnets afford diverse functionalities. We evaluate the extrinsic spin Hall effects of magnetic impurity scattering in ferromagnetic metals. We show that spin-dependent scattering can provide a high spin current polarized perpendicularly to the magnetization direction and is a dominant mechanism in the moderate-conductivity regime. We find that the superposition of the spin-conserve and spin-flip channels causes the spin currents. These findings suggest that optimizing alloy composition is an effective strategy to control the spin Hall effect.