1. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies; School of Materials Sciences and Engineering; University of Science and Technology Beijing; Beijing 100083 P. R. China
2. College of Sciences; Chongqing University of Posts and Telecommunications; Chongqing 400065 P. R. China
3. Institut des Matériaux Jean Rouxel (IMN); Université de Nantes; CNRS; 2 rue de la Houssinière, BP 32229 44322 Nantes Cedex 03 France
4. Laboratory of Crystal Physics; Kirensky Institute of Physics; Federal Research Center KSC SB RAS; Krasnoyarsk 660036 Russia
5. Department of Engineering Physics and Radioelectronics; Siberian Federal University; Krasnoyarsk 660041 Russia
6. Department of Physics; Far Eastern State Transport University; Khabarovsk 680021 Russia