1. Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory HFIPS Chinese Academy of Sciences Hefei Anhui 230031 P. R. China
2. Science Island Branch of Graduate School University of Science and Technology of China Hefei Anhui 230026 P. R. China
3. Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Institutes of Physical Science and Information Technology Anhui University Hefei Anhui 230601 P. R. China
4. Ernst Ruska‐Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute Forschungszentrum Jülich 52425 Jülich Germany
5. Spin‐X Institute Electron Microscopy Center School of Physics and Optoelectronics State Key Laboratory of Luminescent Materials and Devices Guangdong‐Hong Kong‐Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials South China University of Technology Guangzhou 510006 P. R. China
6. School of Physics and Optoelectronics Engineering Anhui University Hefei Anhui 230601 P. R. China