1. Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007
Katowice, Poland
2. Institute
of Experimental Physics, University of Leipzig, Linnestrasse 5, 04103 Leipzig,
Germany
3. NanoBioMedical Centre, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan,
Poland
4. Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland