1. Research Institute for Magnetoelectronics & Weak Magnetic-Field Detection
2. College of Science
3. China Three Gorges University
4. Yichang 443002
5. China
6. State Key Laboratory of Magnetism
7. Institute of Physics
8. Chinese Academy of Science
9. Beijing 100190
10. School of Materials Science and Engineering
11. University of Science and Technology Beijing
12. Beijing 100083
13. Department of Physics and Astronomy
14. University of Delaware
15. Newark
16. USA