Spin pumping into a spin glass material
Spin pumping into a spin glass material
复制标题
DOI：
10.1103/physrevb.101.184412
复制
发表时间：
2019-12
影响因子：
3.7
通讯作者：
Yusei Fujimoto;M. Ichioka;H. Adachi
中科院分区：
文献类型：
--
作者：
Yusei Fujimoto;M. Ichioka;H. Adachi
自旋泵浦是最近建立的用于产生纯自旋电流的手段，由此在铁磁共振条件下将自旋从磁体泵浦到相邻的靶材料中。本文从理论上研究了绝缘铁磁体到自旋玻璃材料的自旋抽运。结合自旋玻璃的动力学理论和自旋抽运的线性响应公式，我们计算了自旋玻璃转变附近的自旋抽运的温度依赖性。分析预测，一个特征峰出现在自旋泵信号，反映了自旋涨落慢自旋冻结开始后。
Spin pumping is a recently established means for generating a pure spin current, whereby spins are pumped from a magnet into the adjacent target material under the ferromagnetic resonance condition. We theoretically investigate the spin pumping from an insulating ferromagnet into spin glass materials. Combining a dynamic theory of spin glasses with the linear-response formulation of the spin pumping, we calculate temperature dependence of the spin pumping near the spin glass transition. The analysis predicts that a characteristic peak appears in the spin pumping signal, reflecting that the spin fluctuations slow down upon the onset of spin freezing.