1. Research Institute for Magnetoelectronics & Weak Magnetic-field Detection
2. College of Science
3. China Three Gorges University
4. Yichang 443002
5. P. R. China
6. College of Electrical Engineering & New Energy
7. Department of Physics
8. Chungbuk National University
9. Cheongju 28644
10. Republic of Korea
11. CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling
12. Institute of Oceanology
13. Chinese Academy of Sciences
14. Qingdao 266071
15. China