1. School of Physics and Astronomy
2. The University of Nottingham
3. Nottingham NG7 2RD, UK
4. High Field Magnet Laboratory
5. Institute for Molecules and Materials
6. Radboud University
7. Nijmegen 6525 ED, The Netherlands
8. Nottingham Nanotechnology and Nanoscience Centre
9. Advanced Technology Institute
10. Faculty of Engineering and Physical Sciences
11. University of Surrey
12. Guildford, UK