1. Institute of Physics, Pedagogical University of Cracow, Podchorążych 2, 30-084 Kraków, Poland
2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland
3. Institute of Applied Physics, Military University of Technology, Urbanowicza 2, 00-908 Warsaw, Poland
4. Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
5. Department of Advanced Materials and Technologies, Military University of Technology, Urbanowicza 2, 00-908 Warsaw, Poland