A.Kh. Gilmutdinov - Dr.Sc. (Eng.), Associate Professor, Kazan National Technical Research University named after A.N. Tupolev. E-mail: agilmutdinov@rambler.ru
M.M. Gil-metdinov - Ph.D. candidate, Kazan National Technical Research University named after A.N. Tupolev. E-mail: marat-kzn@list.ru

R.I. Batalov - Ph.D. (Phys.-Math.), Senior Research Scientist, E.K. Zavoyskii Kazan Physical-Technical Institute of RAS E-mail: batalov@kfti.knc.ru R.M. Bayazitov - Dr.Sc. (Phys.-Math.), Leading Research Scientist, E.K. Zavoyskii Kazan Physical-Technical Institute of RAS, Kazan State Power Engineering University E-mail: batalov@kfti.knc.ru I.A. Faizrakhmanov - Dr.Sc. (Phys.-Math.), Chief Research Scientist, E.K. Zavoyskii Kazan Physical-Technical Institute of RAS E-mail: batalov@kfti.knc.ru G.D. Ivlev - Ph.D. (Phys.-Math.), Senior Research Scientist, Belarussian State University, Minsk, Belarus

L.A. Bliznyuk1, N.V. Lyubetsky2, A.K. Letko3, T.P. Petrochenko4, V.I. Kasko5

1–4 Scientific and Practical Center of the National Academy of Sciences of Belarus
for Materials Science (Minsk, Republic of Belarus)
4 tanya-petr@physics.by