Relation between unidirectional spin Hall magnetoresistance and spin current-driven magnon generation
Relation between unidirectional spin Hall magnetoresistance and spin current-driven magnon generation
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DOI：
10.1063/1.5044737
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发表时间：
2018-06
影响因子：
4
通讯作者：
I. Borisenko;I. Borisenko;V. Demidov;S. Urazhdin;A. Rinkevich;S. Demokritov
中科院分区：
文献类型：
--
作者：
I. Borisenko;I. Borisenko;V. Demidov;S. Urazhdin;A. Rinkevich;S. Demokritov
我们对坡莫合金/铂双层膜中的单向自旋霍尔磁阻(USMR)进行了电子测量，并结合自旋电流驱动的磁振子布居的磁光布里渊光谱学。结果表明，USMR的电流依赖关系与偶极磁振子密度密切相关，并且在80-400K的较大温度范围内，这两种依赖关系呈现出相同的标度。这些发现证明了自旋电流驱动的磁振子的产生与USMR之间的密切关系，并表明后者可能由偶极磁子主导。
We perform electronic measurements of unidirectional spin Hall magnetoresistance (USMR) in a Permalloy/Pt bilayer, in conjunction with magneto-optical Brillouin light spectroscopy of spin current-driven magnon population. We show that the current dependence of USMR closely follows the dipolar magnon density, and that both dependencies exhibit the same scaling over a large temperature range of 80-400 K. These findings demonstrate a close relationship between spin current-driven magnon generation and USMR, and indicate that the latter is likely dominated by the dipolar magnons.