1. Taras Shevchenko National University of Kyiv, 60 Volodymyrska Street, Kyiv city, Ukraine, 01033
2. Kyiv Academic University, 36 Vernadsky blvd., Kyiv, Ukraine, 03142
3. G.V. Kurdyumov Institute for Metal Physics of the National Academy of Science of Ukraine, 36 Vernadsky blvd., Kyiv, Ukraine, 03142