1. Institute of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
2. IOM-CNR, Istituto Officina dei Materiali, S.S. 14 km − 163.5, Basovizza, Trieste 34149, Italy
3. Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia
4. Centre for Advanced Materials Application (CEMEA), Slovak Academy of Sciences, Dúbravská cesta 5807/9, 84511 Bratislava, Slovakia
5. Center of Materials and Nanotechnologies (CEMNAT), Faculty of Chemical Technology, University of Pardubice, Legions Square 565, 530 02 Pardubice, Czech Republic
6. Department of Electronics and Electrical Engineering, Faculty of Science and Technology, Keio University, 223-8522 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
7. Device Technology Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, 305-8568 Ibaraki, Japan
8. Helmholtz-Zentrum Dresden-Rossendorf, e.V. Bautzner Landstrasse 400, D-01328 Dresden, Germany
9. Department of Physics, University of Johannesburg, Auckland Park, PO Box 524, 2006 Johannesburg, South Africa