1. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, School of Sciences, China University of Mining and Technology, Xuzhou 221116, People's Republic of China
2. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
3. School of Materials Science and Engineering, Southeast University, Nanjing 211189, People's Republic of China
4. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
5. Department of Physics, Wake Forest University, Winston-Salem, North Carolina 27109, USA
6. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
7. International Center for New-Structured Materials, Zhejiang University, and Laboratory of New-Structured Materials, State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 310027 Hangzhou, People's Republic of China