1. Department of PhysicsSUPA, Strathclyde University Glasgow G4 0NG UK
2. M.N. Miheev Institute of Metal Physics of the UB RAS 18 S. Kovalevskoy St. Ekaterinburg 620108 Russia
3. Ural Federal University 19 Mira St. Ekaterinburg 620002 Russia
4. Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences Ekaterinburg 620990 Russia
5. LNCMI-CNRS (UJF, UPS, INSA) BP 166 Grenoble 38042, Cedex 9 France
6. Scientific-Practical Material Research Centre of the National Academy of Belarus 19 P. Brovki Minsk 220072 Belarus