Tunable perpendicular anisotropic magnetoresistance in CoO/Co/Pt heterostructures

作     者：Qian-Qian Liu Guang Yang Jing-Yan Zhang Guo-Nan Feng Chun Feng Qian Zhan Ming-Hua Li Guang-Hua Yu Qian-Qian Liu;Guang Yang;Jing-Yan Zhang;Guo-Nan Feng;Chun Feng;Qian Zhan;Ming-Hua Li;Guang-Hua Yu

作者机构：Department of Materials Physics and ChemistryUniversity of Science and Technology BeijingBeijing100083China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第2期

页      面：579-584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：financially supported by the National Key Science Research Projects of China(No.2015CB921502) the National Natural Science Foundation of China(Nos.51331002,51371025,51471028,11504019) the Postdoctoral Science Foundation of China(No.2016M590043) 

主　　题：Perpendicular anisotropic magnetoresistance Magnetic proximity effect Surface scattering X-ray photoelectron spectroscopy 

摘      要：Transport properties of magnetron-sputtered CoO/Co/Pt heterostructures were investigated by physical property measurement *** types of magnetoresistance are observed in the heterostructures,including isotropic anisotropic magnetoresistance(AMR),AMR with geometric size effect,and interfacial effect.A reversal in sign of perpendicular AMR is found in the film CoO(3 nm)/Co(3 nm)/Pt(3 nm)compared to the film CoO(3 nm)/Co(3 nm)/CoO(3 nm),which is associated with ***,perpendicular AMR is tunable in the films CoO(3 nm)/Co(3 nm)/CoO(t)/Pt(3 nm)and CoO(3 nm)/Co(3 nm)/Pt(t)/CoO(3 nm)at will,with either positive or negative value,by varying the inserting layer *** electronic structure information of the samples was measured by X-ray photoelectron spectroscopy(XPS).The spin-related transport and XPS results manifest that magnetic proximity effect,surface scattering,together with oxygen migration contribute to the tunable function of Pt.