1. Fert Beijing Institute and School of Microelectronics, Beihang University, Beijing 100191, China
2. Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University, Beijing 100191, China
3. Hefei Innovation Research Institute, Beihang University, Hefei 230013, China
4. School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
5. School of Electronic and Information Engineering, Beihang University, Beijing 100191, China