1. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk 220072, Belarus
2. Scientific-Practical Materials Research Centre, National Academy of Sciences of Belarus, Minsk 220072, Belarus
3. Department of Physics, SUPA, Strathclyde University, 107 Rottenrow, Glasgow G4 0NG, United Kingdom
4. M. N. Mikheev Institute of Metal Physics, UB RAS, Yekaterinburg 620108, Russia
5. Ural Federal University, Yekaterinburg 620002, Russia
6. Institute of Solid State Chemistry of the UB RAS, Ekaterinburg 620990, Russia