1. Faculty
of Electrical Engineering, Czestochowa University of Technology, Al. Armii
Krajowej 17, 42-200 Czestochowa, Poland
2. Institute
of Materials Physics and Technology, Hamburg University of Technology (TUHH), D-21073 Hamburg, Germany
3. Institute
of Applied Physics, Department of New Technologies and Chemistry, Military University of Technology, Ul. gen. Sylwestra Kaliskiego 2, P-00-908 Warszawa, Poland