1. School of Physical Science and Technology & School of Materials and Energy & Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University Lanzhou 730000 China
2. Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Laboratory for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an Shaanxi 710119 China
3. School of Physics and Opto‐Electronic Technology Collaborative Innovation Center of Rare‐Earth Optical Functional Materials and Devices Development Baoji University of Arts and Sciences Baoji Shaanxi 721016 China