1. Key Laboratory for Magnetism and Magnetic Materials of MOE
2. Key Laboratory of Special Function Materials and Structure Design of MOE
3. Lanzhou University
4. Lanzhou 730000
5. P. R. China
6. Department of Materials Science and Engineering
7. National University of Singapore
8. Singapore
9. Institute of Chemical and Engineering Sciences
10. A*STAR
11. Jurong Island
12. Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
13. The Research Center of Biomedical Nanotechnology
14. Lanzhou