1. Institute of Magnetism of the National Academy of Sciences of Ukraine and the Ministry of Education and Science of Ukraine, Kiev 03142, Ukraine
2. Taras Shevchenko National University of Kiev, Kiev 03127, Ukraine
3. Institute of Physics, National Academy of Sciences of Ukraine, Kiev 03028, Ukraine
4. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia
5. Department of Physics, University of Gothenburg, Gothenburg 41296, Sweden
6. NanOsc AB, Kista 16440, Sweden