1. School of Chemistry and Materials Science,
Key Laboratory of Magnetic Molecules and Magnetic Information Materials,
Ministry of Education, Shanxi Normal University, Linfen 041004, China
2. Research Institute of Materials Science, Shanxi Normal University, Linfen 041004, China
3. Key Laboratory of Advanced Materials (MOE), School of
Materials Science and Engineering, Tsinghua University, Beijing 100084, China
4. Spintronics and Nanodevice
Laboratory, Department of Electronics, University of York, York YO10 5DD, U.K.
5. Department of Electronic
Engineering, Royal Holloway, University of London, Egham, Surrey TW20 0EX, U.K.
6. Harwell Science and Innovation Campus, Diamond Light Source, Didcot, Oxfordshire OX11 0DE, U.K.