1. Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura St. 5, 02-093 Warsaw, Poland
2. National Institute for Materials Science, Tsukuba 305-0047, Ibaraki, Japan
3. Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
4. Department of Physics and Electrical Engineering, Linnaeus University, SE-391 82 Kalmar, Sweden
5. Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA, 25 avenue des Martyrs, 38042 Grenoble, France