1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People’s Republic of China
2. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, People’s Republic of China
3. Key Laboratory of Magnetic Materials and Devices & Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, People’s Republic of China
4. Fert Beijing Institute, Beihang University, Beijing, People’s Republic of China
5. School of Electronic and Information Engineering, Beihang University, Beijing, China
6. Department of Physics, University of York, York YO10 5DD, United Kingdom
7. School of Electronic Science and Engineering, Nanjing University, Nanjing 210046, People’s Republic of China