1. CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China
2. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China
3. College of Materials Science and Opto‐Electronic Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
4. Department of Mechanical Materials and Manufacturing Engineering The University of Nottingham Ningbo China Ningbo 315100 P. R. China
5. School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
6. National Institute for Materials Science 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan