1. School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China
3. Laboratory of Crystal Physics, Kirensky Institute of
Physics, Siberian Branch of the Russian Academy of Sciences (SB RAS), Krasnoyarsk 660036, Russia
4. Department
of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia