1. Inner Mongolia Autonomous Region Engineering Research Center for Rare Earth Functions and New Energy Storage Materials Inner Mongolia Normal University 81 Zhaowuda Road Hohhot Inner Mongolia 010022 China
2. School of Physics and Electronic Information Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials Inner Mongolia Normal University 81 Zhaowuda Road Hohhot Inner Mongolia 010022 China
3. School of Physical Science and Technology Inner Mongolia University 2352 West University Road Hohhot Inner Mongolia 010021 China
4. Ordos Institute of Technology Ordos Inner Mongolia 017000 China