Condensed Matter Physics Department, Physics Faculty, Chelyabinsk State University, Chelyabinsk, Russia
Condensed Matter Physics Department, Physics Faculty, Chelyabinsk State University, Chelyabinsk, Russia
Copyright © 2020 Alfiya G. Fazlitdinova, Vasiliy A. Tyumentsev et al. This is
an open access article distributed under the Creative Commons Attribution
License, which permits unrestricted use, distribution, and reproduction in any
medium, provided the original work is properly cited.