[1
]Department of Materials Science and EngineeringNational University of Singapore Singapore
117575 Singapore
[2
]Department of Electronic MaterialInstitute of Material Research and EngineeringA*STAR
Singapore 138634 Singapore
[3
]Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsUniversity
of Chinese Academy of SciencesChinese Academy of Sciences Beijing 100190 China
[4
]CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials
Technology and EngineeringChinese Academy of Sciences Ningbo 315201 China
[5
]Singapore Synchrotron Light SourceNational University of Singapore Singapore 117575
Singapore
[6
]College of electronics and informationHangzhou Dianzi University Hangzhou 310018 China
[7
]Suzhou Research InstituteNational University of Singapore Suzhou 215123 China