1. Institute for Superconducting & Electronic Materials University of Wollongong Innovation Campus Wollongong NSW 2500 Australia
2. School of Physics Nankai University Tianjin 300071 China
3. Institute for Applied Materials (IAM) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
4. BUAA-UOW Joint Centre School of Physics Beihang University Beijing 100191 China
5. College of Material and Science Beijing University of Technology Beijing 100124 China
6. SIMS Facility Western Sydney University Locked Bag 1797 Penrith NSW 2751 Australia