1. Fert Beijing Research Institute MIIT Key Laboratory of Spintronics School of Integrated Circuit Science and Engineering Beihang University Beijing 100191 P. R. China
2. Beihang‐Goertek Joint Microelectronics Institute Qingdao Research Institute Beihang University Qingdao 266101 P. R. China
3. Beihang Hangzhou Innovation Institute Yuhang Xixi Octagon City, Yuhang District Hangzhou 310023 P. R. China
4. Nanoelectronics Science and Technology Center Hefei Innovation Research Institute Beihang University Hefei 230013 P. R. China