1. Nanotechnology Centre, VŠB-Technical University of Ostrava, Ostrava 70800, Czech Republic
2. IT4Innovations, VŠB-Technical University of Ostrava, Ostrava 70800, Czech Republic
3. Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University, Bielefeld 33615, Germany
4. Faculty of Mathematics and Physics, Charles University, Prague 12116, Czech Republic
5. Institute for Materials Research, Tohoku University, Sendai 980-8576, Japan
6. Department of Applied Physics, Tohoku University, Sendai 980-8576, Japan