1. Key Lab for Magnetism and Magnetic Materials of Ministry of Education
2. Lanzhou University
3. Lanzhou 730000
4. People's Republic of China
5. Max-Planck-Institute of Microstructure Physics
6. School of Physics Science and Technology
7. China
8. Halle
9. Germany
10. Physics Department
11. M.V. Lomonosov Moscow State University