1. Clarendon
Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom
2. Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
3. Magnetic Spectroscopy Group, Diamond
Light Source, Didcot, OX11
0DE, United Kingdom