1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
2. School of Physical Science and Technology
3. Lanzhou University
4. Lanzhou 730000
5. China
6. School of Physics and Optoelectronic Engineering
7. Ludong University
8. Yantai 264025
9. State Key Laboratory of Applied Organic Chemistry
10. Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
11. College of Chemistry and Chemical Engineering