1. Department of Physics, Chelyabinsk State University, Chelyabinsk 454001, Russia
2. National Research South Ural State University, Chelyabinsk 454080, Russia
3. Immanuel Kant Baltic Federal University, Kaliningrad 236016, Russia
4. Institute of Molecule and Crystal Physics RAS, Ufa 450075, Russia
5. Ufa State Aviation Technical University, Ufa 450008, Russia