Observation of giant interfacial spin Hall angle in Y3Fe5O12/Pt heterostructures

作     者：Y. Dai S. J. Xu S. W. Chen X. L. Fan D. Z. Yang D. S. Xue D. S. Song J. Zhu S. M. Zhou Xuepeng Qiu 

作者机构：Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology and Pohl Institute of Solid State Physics School of Physics Science and Engineering Tongji University Shanghai 200092 China The Key Lab for Magnetism and Magnetic Materials of Ministry of Education Lanzhou University Lanzhou 730000 China National Center for Electron Microscopy in Beijing Key Laboratory of Advanced Materials (MOE) and The State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Physical Review B》 (凝聚态物质与材料物理学)

年 卷 期：2019年第100卷第6期

页      面：064404-064404页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：National Key R & D Program of China, (2017YFA0303202, 2017YFA0305300) State Key Project of Fundamental Research, (2015CB921501) Natural Science Foundation of Shanghai, (17ZR1443700, 19ZR1478700) National Natural Science Foundation of China, NSFC, (11674246, 11774064, 11874283, 51331004, 51501131, 51671147, 51801152) Fundamental Research Funds for the Central Universities Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, (TP2016016) 

主　　题：Spin Hall effect Spin relaxation 

摘      要：By self-consistently resolving the disentanglement of the spin Hall angle (SHA) and the spin diffusion length (SDL) through the ratio of Hanle and spin Hall magnetoresistances, the SHA in heavy metals has been for the first time rigorously extracted. For Pt on ferromagnetic insulator Y3Fe5O12, the genuine SHA scales as an exponential function of the Pt layer thickness. The spin Hall effect is proved to be dominated by the Berry-phase-induced intrinsic mechanism. In particular, the giant interfacial SHA of 0.33 is observed and is attributed to the broken-symmetry-induced nonspecular electronic scattering at the Y3Fe5O12/Pt interface. At last, the spin relaxation process is found to be dominated by the Elliott-Yafet and D yakonov-Perel mechanisms for thin and thick Pt layers, respectively.