Correlation between the Dzyaloshinskii-Moriya interaction and spin-mixing conductance at an antiferromagnet/ferromagnet interface

作     者：Xin Ma Guoqiang Yu Seyed A. Razavi Liang Chang Lei Deng Zhaodong Chu Congli He Kang L. Wang Xiaoqin Li 

作者机构：Department of Electrical and Computer Engineering University of California Santa Barbara California 93106 USA Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Department of Electrical Engineering University of California Los Angeles California 90095 USA Department of Physics Center for Complex Quantum Systems University of Texas Austin Texas 78712 USA Department of Physics University of California Los Angeles California 90095 USA 

出 版 物：《Physical Review B》 (Phys. Rev. B)

年 卷 期：2018年第98卷第10期

页      面：104428-104428页

核心收录：

基　　金：1000 Youth Talents Program Energy Frontier Research Center US Department of Energy U.S. Department of Energy, DOE Office of Science, SC Basic Energy Sciences, BES, (BES) Basic Energy Sciences, BES Santa Fe Institute, SFI, (51861135104) Santa Fe Institute, SFI Science Foundation Ireland, SFI National Natural Science Foundation of China, NSFC, (11874409) National Natural Science Foundation of China, NSFC 

主　　题：Antiferromagnetism Dzyaloshinskii-Moriya interaction Spin pumping Spin waves Magnetic multilayers Brillouin scattering & spectroscopy 

摘      要：The rich interaction phenomena at antiferromagnet (AFM)/ferromagnet (FM) interfaces are key ingredients in AFM spintronics, where many underlying mechanisms remain unclear. Here we report on a correlation observed between the interfacial Dzyaloshinskii-Moriya interaction (DMI) DS and effective spin-mixing conductance geff↑↓ at the IrMn/CoFeB interface. Both DS and geff↑↓ are quantitatively determined with Brillouin light-scattering measurements, and increase with IrMn thickness in the range of 2.5∼7.5 nm. Such correlation likely originates from the AFM-states-mediated spin-flip transitions in the FM, which promote both the interfacial DMI and spin-pumping effect. Our findings provide deeper insight into the AFM-FM interfacial coupling for future spintronic design.