| Affiliation: | 1. Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA;5. Institute of Physics, Chinese Academy of Science, Beijing 100190, China |
