1. Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe UniversityMelbourneVictoria3086Australia
2. Department of Physics, Center for Quantum Spintronics, Norwegian University of Science and TechnologyNO‐7491 TrondheimNorway
3. Australian Synchrotron800 Blackburn RoadClaytonVictoria3168Australia
4. School of Physics, The University of MelbourneMelbourneVictoria3010Australia
5. Melbourne Centre for Nanofabrication151 Wellington RoadClaytonVictoria3168Australia