1. Department of Physics, SUPA, Strathclyde University, Glasgow G4 0NG, United Kingdom; Ural Federal University, Ekaterinburg 620002, Russia; and Institute of Solid State Chemistry of the Urals Branch of RAS, Ekaterinburg 620990, Russia
2. Ural Federal University, Ekaterinburg 620002, Russia
3. Institute of Physics, National Academy of Sciences of Azerbaijan, H.Cavid ave., 33, AZ-1143 Baku, Azerbaijan
4. Department of Physics, SUPA, Strathclyde University, Glasgow G4 0NG, United Kingdom