Spin Seebeck effect and spin Hall magnetoresistance at high temperatures for a Pt/yttrium iron garnet hybrid structure

作者：Shuanhu Wang, Shuanhu Wang, Lvkuan Zou, Xu Zhang, Jianwang Cai, Shufang Wang, Shufang Wang, Baogen Shen, Jirong Sun · 发表于：Nanoscale · 年份：2015 · DOI：10.1039/c5nr05484b · 被引用次数：34 · 研究领域：Magneto-Optical Properties and Applications、Magnetic properties of thin films、Quantum and electron transport phenomena

Based on unique experimental setups, the temperature dependences of the longitudinal spin Seebeck effect (LSSE) and spin Hall magnetoresistance (SMR) of the Pt/yttrium iron garnet (Pt/YIG) hybrid structure are determined in a wide temperature range up to the Curie temperature of YIG. From a theoretical analysis of the experimental relationship between the SMR and temperature, the spin mixing conductance of the Pt/YIG interface is deduced as a function of temperature. Adopting the deduced spin mixing conductance, the temperature dependence of the LSSE is well reproduced based on the magnon spin current theory. Our research sheds new light on the controversy about the theoretical models for the LSSE.