1. Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University 1 , Beijing 100191, China
2. Beihang-Geortek Joint Microelectronics Institute, Qingdao Research Institute, Beihang University 2 , Qingdao 266600, China
3. Zhongfa Aviation Institute of Beihang University, Beihang University 3 , Hangzhou 311115, China