Tailoring perpendicular magnetic anisotropy in Co/Pt multilayers by interface doping with ultrathin Fe layer  

作　　者：Xi Chen Shao-Long Jiang Dong-Wei Wang Kang Yang Jin-Hui Lu Guang-Hua Yu 

机构地区：[1]Department of Materials Physics and Chemistry,University of Science and Technology Beijing,Beijing,100083,China [2]National Center for Nanoscience and Nanotechnology,Beijing,100190,China

出　　处：《Rare Metals》2022年第11期3823-3827,共5页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51371027 and 51331002);the National Key Scientific Research Projects of China (No.2015CB921502);the Ph.D.Programs Foundation of Ministry of Education (No.20120006130002)。

摘　　要：The effect of ultrathin Fe layer on perpendicular magnetic anisotropy(PMA) in magnetron-sputtered Co/Pt multilayers was investigated by magnetic measurements.Magnetization hysteresis(M-H) loops and microstructures of the samples were measured by vibrating sample magnetometer(VSM) and X-ray diffraction(XRD) and highresolution transmission electron microscopy(HRTEM),respectively.It is found that the PMA is strongly dependent on the interface where Fe layer was doped.When Fe layer was doped at Co/Pt interface where Pt was deposited on Co,the PMA decreases monotonically with Fe layer thickness(tFe) increasing.However,when Fe layer was doped at Pt/Co interface where Co was deposited on Pt,the PMA shows a peak at t_(Fe)=0.1 nm.It is considered that the PMA variation is mainly due to the tuning in the electron occupation states of 3 d orbits at Fe-doped Pt/Co interface.Furthermore,the annealing stability of PMA can also be improved when Fe layer was doped at Pt/Co interface.HRTEM results demonstrate that the magnetic anisotropy evolution is mainly caused by anneal-induced interdiffusion.

关 键 词：Perpendicular magnetic anisotropy Co/Pt multilayers Interface doping Annealing stability INTERDIFFUSION 

分 类 号：TB383.2[一般工业技术—材料科学与工程] O469[理学—凝聚态物理]