1. Silesian University of Technology, Faculty of Mechanical Engineering, Institute of Engineering Materials and Biomaterials, S. Konarskiego 18a, 44-100 Gliwice, Poland
2. Częstochowa University of Technology, Faculty of Production Engineering and Materials Technology, Institute of Physics, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
3. Polish Academy of Sciences, Institute of Molecular Physics, Department of Magnetic Alloys, M. Smoluchowskiego 17, 60-179 Poznań, Poland