Longitudinal spin Seebeck effect in various garnet ferrites
Longitudinal spin Seebeck effect in various garnet ferrites
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DOI：
10.1103/physrevb.87.104412
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发表时间：
2013-03
影响因子：
3.7
通讯作者：
K. Uchida;T. Nonaka;T. Kikkawa;Y. Kajiwara;E. Saitoh
中科院分区：
文献类型：
--
作者：
K. Uchida;T. Nonaka;T. Kikkawa;Y. Kajiwara;E. Saitoh
通过 Pt 薄膜中的逆自旋霍尔效应，研究了各种石榴石铁氧体 YFeO(, Ca;, Mn, V, In, Zr) 中的纵向自旋塞贝克效应 (LSSE)。发现 Pt/YFeO 样品中 LSSE 电压的大小随着石榴石铁氧体中 Fe 浓度的增加而增强，这可以通过 Pt/YFeO 界面处自旋混合电导的变化来解释。我们还研究了 LSSE 电压对 YFeO 宏观磁性参数的依赖性。实验结果表明，Pt/YFeO样品中的LSSE电压与居里温度和饱和磁化强度呈正相关，但与样品的旋磁比和吉尔伯特阻尼常数没有明显的相关性。
The longitudinal spin Seebeck effect (LSSE) is investigated in various garnet ferrites YFeO(, Ca;, Mn, V, In, Zr) by means of the inverse spin Hall effect in Pt films. The magnitude of the LSSE voltage in the Pt/YFeOsamples is found to be enhanced with increasing concentration of Fe in the garnet ferrites, which can be explained by a change in the spin-mixing conductance at the Pt/YFeOinterfaces. We also investigate the dependence of the LSSE voltage on macroscopic magnetic parameters of YFeO. The experimental results show that the LSSE voltage in the Pt/YFeOsamples has a positive correlation with the Curie temperature and the saturation magnetization, but no clear correlation with the gyromagnetic ratio and the Gilbert damping constant of the samples.