1. National Center for Electron Microscopy in Beijing
2. School of Materials Science and Engineering
3. Key Laboratory of Advanced Materials of Ministry of Education of China
4. State Key Laboratory of New Ceramics and Fine Processing
5. Tsinghua University
6. Department of Physics
7. Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field
8. University of Science and Technology Beijing
9. Beijing 100083
10. China
11. State Key Laboratory of Superhard Materials
12. College of Physics
13. Jilin University
14. Changchun 130012