1. Cardinal Stefan Wyszyński University, Faculty of Mathematics and Natural Sciences. School of Exact Sciences, Department of Physics, K. Wóycickiego 1/3, 01-938 Warsaw, Poland
2. Institute of Ceramics and Building Materials, Department of Ceramic Technology, Postępu 9, 02-676 Warsaw, Poland
3. AGH University of Science and Technology, Faculty of Physics and Computer Science, Department of Solid State Physics, al. A. Mickiewicza 30, 30-059 Cracow, Poland
4. Institute of Electron Technology, Department of Microelectronics, Zabłocie 39, 30-701 Cracow, Poland