Incoherent spin pumping from YIG single crystals
Incoherent spin pumping from YIG single crystals
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DOI：
10.1103/physrevb.99.220402
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发表时间：
2019-06-12
影响因子：
3.7
通讯作者：
Chien, C. L.
中科院分区：
文献类型：
--
作者：
Chen, Y. S.;Lin, J. G.;Chien, C. L.
在亚毫米范围内具有合适YIG厚度的YIG/Pt中的铁磁共振（FMR）显示来自均匀FMR（UFMR）模式和各种自旋波共振（SWR）模式的纯自旋电流贡献，每种模式具有不同的吸收强度、逆自旋霍尔电压和温度依赖性。在所有模式中，具有非零力矩沿厚度方向沿着传递的驻波比高阶模式感应的直流电压最大。由UFMR和SWR驱动的自旋电流分别具有线性T和幂律T依赖性。此外，混合电导推导出这两种模式，表示幂律T依赖性。在YIG/Pt中没有相干自旋泵浦的证据。
Ferromagnetic resonance (FMR) in yttrium iron garnet (YIG)/Pt with a suitable YIG thickness in the submillimeter range show pure spin current contributions from the uniform FMR (UFMR) mode and various spin-wave resonance (SWR) modes, each with a different absorption intensity, inverse spin Hall voltage, and temperature dependence. The higher order mode of SWR with nonzero moment transferring along the thickness direction induces a maximum dc voltage among all modes. The spin current driven by UFMR and SWR has a linear T and power-law T dependence, respectively. In addition, the mixing conductance is derived for both modes, indicative of power-law T dependences. There is an absence of evidence for coherent spin pumping in YIG/Pt.