1. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341119, P. R. China
2. Jiangxi Institute of Rare Earths, Chinese Academy of Sciences, Chinese Academy of Sciences, Ganzhou 341119, P. R. China
3. School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
4. Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China