Gerd Schönhense³ and Ján Minár^1,*

• ¹New Technologies-Research Centre, University of West Bohemia in Pilsen, 30100 Pilsen, Czech Republic
• ²Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Praha 6, Czech Republic
• ³Institut für Physik, Johannes Gutenberg-Universität, 55128 Mainz, Germany
• ⁴Sumy State University, Faculty of Electronics and Information Technologies, Department of Electronics, General and Applied Physics, 116, Kharkivska Street, 40007 Sumy, Ukraine
• ⁵Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)—UMR 6251, F-35000 Rennes, France
• ⁶Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Kraków, Poland
• ⁷Physikalisches Institut, Goethe Universität Frankfurt, Campus Riedberg, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany
• ⁸V. G. Baryakhtar Institute of Magnetism of the NAS of Ukraine, 03142 Kyiv, Ukraine

• ^*Contact author: jminar@ntc.zcu.cz