Giant enhancement of spin pumping in the out-of-phase precession mode
Giant enhancement of spin pumping in the out-of-phase precession mode
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DOI：
10.1063/1.4863961
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发表时间：
2014-02
影响因子：
4
通讯作者：
S. Takahashi
中科院分区：
文献类型：
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作者：
S. Takahashi
我们从理论上研究了嵌入在正常金属中的两个铁磁层的自旋泵浦，并研究了旋进磁化产生的自旋电流和自旋积累，重点是它们对相对旋进运动和层分离的依赖性。我们证明了一个巨大的增强自旋泵浦诱导的异相旋进模式的磁化，其中泵浦的自旋电流和自旋积累大大增强相比，在同相旋进模式。讨论了自旋泵激的巨大增强与增强的吉尔伯特阻尼的关系。
We theoretically study the spin pumping from the two ferromagnetic layers embedded in a normal metal and investigate the spin current and spin accumulation generated by the precessing magnetizations, focusing on their dependence on the relative precessional motion and the layer separation. We demonstrate a giant enhancement of spin pumping induced in the out-of-phase precession mode of the magnetizations in which the pumped spin current and spin accumulation are greatly enhanced compared to those in the in-phase precession mode. The giant enhancement of spin pumping is discussed in relation to an enhanced Gilbert damping.