1. Clarendon
Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
2. Physik Department, Technische Universität München, 85748 Garching, Germany
3. Diamond Light Source, Didcot OX11 0DE, United Kingdom
4. Institut für Angewandte Photophysik, TU Dresden, 01069 Dresden, Germany
5. Crystal
Growth Facility, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
6. Magnetic Spectroscopy
Group, Diamond Light Source, Didcot OX11 0DE, United Kingdom