1. Analytical and Testing Center of Chongqing University, Chongqing 401331, P. R. China
2. Beijing Key Laboratory and Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, P. R. China
3. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P. R. China
4. Department of Materials and Environmental Engineering, Institute for Advanced Magnetic Materials, Hangzhou Dianzi University, Hangzhou 310018, P. R. China
5. Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
6. College of Physics and Center for Quantum Materials and Devices, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, P. R. China