1. Faculty of Energy and Fuels AGH University of Science and Technology 30-059 Krakow Poland
2. Institute of Experimental Physics University of Wrocław 50-204 Wrocław Poland
3. Division of Magnetic Research Institute of Low Temperature and Structure Research 53-421 Wroclaw Poland
4. Faculty of Materials Science and Ceramics AGH University of Science and Technology 30-059 Krakow Poland
5. Faculty of Physics and Applied Computer Science AGH University of Science and Technology 30-059 Krakow Poland