1. Institute of Magnetism of the NAS of Ukraine and MES of Ukraine, Kyiv 03142, Ukraine
2. Nanostructure Physics, Royal Institute of Technology, Stockholm 10691, Sweden
3. Taras Shevchenko National University of Kyiv, Kyiv 01601, Ukraine
4. National Institute of Materials Physics, Bucharest-Magurele 077125, Romania
5. B. Verkin Institute for Low Temperature Physics and Engineering, of the National Academy of Sciences of Ukraine, Kharkiv 61103, Ukraine