1. MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Northwestern Polytechnical University Xi'an 710072 China
2. Department of Physics Beijing Technology and Business University Beijing 100037 China
3. Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKLMMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC‐ESAT) School of Materials Science and Engineering Peking University Beijing 100871 China