Spin Seebeck effect and spin Hall magnetoresistance in the Pt/Y_3Fe_5O_(12) heterostructure under laser-heating

作     者：Shuanhu Wang Gang Li Jianyuan Wang Yingyi Tian Hongrui Zhang Lvkuan Zou Jirong Sun Kexin Jin 王拴虎;李刚;王建元;田颖异;张洪瑞;邹吕宽;孙继荣;金克新

作者机构：Shaanxi Key Laboratory of Condensed Matter Structures and Properties School of Science Northwestern Polytechnical University Xi'an 710072 China Beijing National Laboratory for Condensed Matter and Institute of Physics Chinese Academy of Sciences Beijing 100190 China High Magnetic Field Laboratory Chinese Academy of Science Hefei 230031 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第11期

页      面：310-315页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11604265,51471134,51572222,and 11704386) the Fundamental Research Funds for the Central Universities,China(Grant Nos.3102018zy044 and 3102017jc01001) 

主　　题：spin Seebeck effect spin Hall magnetoresistance laser heating yttrium iron garnet 

摘      要：In the previous study of longitudinal spin Seebeck effect（LSSE）, the thermal gradient was often generated by inserting the sample between the cool bath and the hot bath. For practical use, this method is too cumbersome to be easily integrated into modern electrical circuits. Since the laser can be easily focused into a small region, it will be more convenient and friendly to the integrated circuit. In this paper, we systematically investigate the LSSE and spin Hall magnetoresistance（SMR） of the Pt/Y_3 Fe_5 O_（12） heterostructure under focused laser-heating. We find that the extremely large voltage of inverse spin Hall effect（VISHE） can be obtained by reducing the diameter of laser or increasing the number of light ***, even under the illumination of the ultraviolet light which will excite the electron from the valence band to the conduction band in yttrium iron garnet（YIG）, the magnitude of SMR is nearly constant. It indicates that the spin transport behavior of the adjacent Pt is independent of the electron configuration of YIG. The laser-heating method to generate LSSE will be very promising for modern integrated electronic circuits and will promote the application of spin caloritronics in practice.