1. Departments of Physical Chemistry and Experimental Physics, Palacky University, Svobody 26, 77146 Olomouc, Czech Republic
2. Department of Magnetics, Institute for Physical High Technology, Albert‐Einstein‐Str. 9, 07745 Jena, Germany
3. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 61662 Brno, Czech Republic