[1] Tech Univ Ostrava, Fac Met & Mat Engn, Dept Mat Engn, Ostrava 70833, Czech Republic
[2] Tech Univ Ostrava, Fac Met & Mat Engn, Dept Automat & Comp Sci Met, Ostrava 70833, Czech Republic
[3] Univ Alexander Dubcek Trencin, Fac Ind Technol, Dept Phys Engn Mat, Puchov 02001, Slovakia
[4] Tech Univ Ostrava, Fac Min & Geol, Inst Phys, Ostrava 70833, Czech Republic
[5] Tech Univ Ostrava, Fac Met & Mat Engn, RMTVC, Ostrava 70833, Czech Republic
[6] Tech Univ Ostrava, Nanotechnol Ctr, Ostrava 70833, Czech Republic