1. College of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
2. Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou, China
3. School of Physics and Physical Engineering, Qufu Normal University, Qufu, China
4. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China