Affiliation: | a Institute of Solid State Physics and Chemistry, Uzhgorod National University, Pidhirna 46, 88000 Uzhgorod, Ukraineb Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 5209 CNRS-Université de Bourgogne, 9 Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, Francec Institute of Physics, National Academy of Sciences, 03 650 Kyiv, Ukraine |