1. School of Materials Science and EngineeringKey Laboratory of Advanced Ceramics and Machining Technology of the Ministry of EducationTianjin Key Laboratory of Composite and Functional MaterialsTianjin University Tianjin 300072 P. R. China
2. Stanford Synchrotron Radiation Light SourceSLAC National Accelerator Laboratory Menlo Park CA 94025 USA
3. Institute for Superconducting and Electronic MaterialsAustralian Institute for Innovative MaterialsUniversity of Wollongong Innovation Campus Squires Way North Wollongong NSW 2522 Australia
4. School of Materials Science and EngineeringHebei University of Technology Tianjin 300132 P. R. China
5. Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin University Binhai New City Fuzhou 350207 P. R. China