1. Institute of Solid State Chemistry, Ural Division RAS, Pervomaiskaya Str. 91, 620219 Yekaterinburg, Russia
2. Russian State Vocational Pedagogical University, 620012 Yekaterinburg, Russia
3. Joint Institute of Solid State and Semiconductor Physics NASB, P. Brovki 17, 220072 Minsk, Belarus