Cand. Sci. (Phys.-Math.), Assoc. Prof. of the Condensed Matter Physics Department, North Ossetian State University named after K. L. Khetagurov (Russia, 362025, Republic of North Ossetia – Alania, Vladikavkaz, Vatutin st., 44-46); Leading Scientific Researcher of the Information Center, Joint Institute for Nuclear Research (Russia, 141980, Moscow region, Dubna, Academician Baldin st., 4)