1. Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, School of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot, People’s Republic of China
2. School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, People’s Republic of China
3. State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou, People’s Republic of China