Affiliation: | 1. Institute of Microelectronics, School of Physical Science and Technology, Lanzhou University, South Tianshui Road 222#, Lanzhou 730000, People''s Republic of China;2. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, South Tianshui Road 222#, Lanzhou 730000, People''s Republic of China;3. Department of Physics, Shaoxing University, Shaoxing 312000, People''s Republic of China |