1. Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Centre for Physical Mechanics and Biophysics School of Physics Sun Yat‐sen University Guangzhou 510275 China
2. Singapore Synchrotron Light Source (SSLS) National University of Singapore 5 Research Link Singapore 117603 Singapore
3. Department of Materials Science & Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117576 Singapore