1. Dipartimento di Fisica, Universitá di Roma “La Sapienza” – P. le Aldo Moro 2, 00185 Roma, Italy
2. Microscopy and Magnetism Group, Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland
3. CELLS – ALBA Synchrotron Radiation Facility, Carrer de la Llum 2-26, 08290, Cerdanyola del Valles, Barcelona, Spain
4. Research Institute for Interdisciplinary Science (RIIS), Okayama University, Okayama 700-8530, Japan
5. National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan
6. Department of Physics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
7. Department of Quantum Matter, Hiroshima University, Hiroshima 739-8530, Japan
8. Department of Applied Physics, Waseda University, Tokyo 169-8555, Japan