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