1. Institute of Issues of Chemical Physics, RAS, 142432 Chernogolovka, MD, Russia http://www.icp.ac.ru
2. Laboratoire National des Champs Magnetiques Intenses (UPR 3228 CNRS, INSA, UJF, UPS), 143 avenue de Rangueil, 31400 Toulouse, France
3. Institut de Ciencia de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Spain