1. Institute of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
2. Institute of Physics, Faculty of Mathematics and Natural Science, Jan Długosz University, al. Armii Krajowej 13/15, 42-200 Częstochowa, Poland
3. Department of Physics, Faculty of Production Engineering and Logistics, Opole University of Technology, Ozimska 75, 45-370 Opole, Poland