1. Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland
2. Institute of Materials for Electronics and Magnetism (IMEM), CNR, Parco Area delle Scienze 37/A, Parma, Italy
3. Department of Mathematical, Physical and Computer Sciences, the University of Parma, Parco Area delle Scienze 7/A, Parma, Italy
4. Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
5. Department of Experimental Physics, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
6. Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland