Thickness-dependent magnetic properties in Pt/[Co/Ni]_(n) multilayers with perpendicular magnetic anisotropy

作     者：晏春杰 陈丽娜 周恺元 杨留鹏 付清为 王文强 岳文诚 梁力克 陶醉 杜军 王永磊 刘荣华 Chunjie Yan;Lina Chen;Kaiyuan Zhou;Liupeng Yang;Qingwei Fu;Wenqiang Wang;Wen-Cheng Yue;Like Liang;Zui Tao;Jun Du;Yong-Lei Wang;Ronghua Liu

作者机构：National Laboratory of Solid State MicrostructuresSchool of Physics and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China School of Electronics Science and EngineeringNanjing UniversityNanjing 210093China 

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

年 卷 期：2023年第32卷第1期

页      面：503-508页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.11774150,12074178,12004171,12074189,and 51971109) the Applied Basic Research Programs of Science and Technology Commission Foundation of Jiangsu Province,China (Grant No.BK20170627) the National Key Research and Development Program of China (Grant No.2018YFA0209002) the Open Research Fund of Jiangsu Provincial Key Laboratory for Nanotechnology the Scientific Foundation of Nanjing University of Posts and Telecommunications (NUPTSF) (Grant No.NY220164) 

主　　题：perpendicular magnetic anisotropy magnetic domain damping multiayers 

摘      要：We systematically investigated the Ni and Co thickness-dependent perpendicular magnetic anisotropy(PMA)coefficient,magnetic domain structures,and magnetization dynamics of Pt(5 nm)/[Co(t_(Co))/Ni(t_(Ni))]_(5)/Pt(1 nm)multilayers by combining the four standard magnetic characterization *** magnetic-related hysteresis loops obtained from the field-dependent magnetization M and anomalous Hall resistivity(AHR)ρxy showed that the two serial multilayers with t_(Co)=0.2 nm and 0.3 nm have the optimum PMA coefficient K_(U) as well as the highest coercivity H_(C) at the Ni thickness t_(Ni)=0.6 ***,the magnetic domain structures obtained by magneto-optic Kerr effect(MOKE)microscopy also significantly depend on the thickness and K_(U) of the ***,the thickness-dependent linewidth of ferromagnetic resonance is inversely proportional to K_(U) and H_(C),indicating that inhomogeneous magnetic properties dominate the ***,the intrinsic Gilbert damping constant determined by a linear fitting of the frequency-dependent linewidth does not depend on the Ni thickness and K_(U).Our results could help promote the PMA[Co/Ni]multilayer applications in various spintronic and spin-orbitronic devices.