Faculty of Physics;
University of Warsaw;
ul.Pasteura 5;
02-093 Warsaw;
Poland;
National Institute for Materials Science;
Tsukuba;
Ibaraki 305-0044;
Japan;
Laboratoire National des Champs Magnetiques Intenses;
CNRS-UJF-UPS-INSA;
avenue des Martyrs 25;
38042 Grenoble;
France;