1. Department of Materials Science and New Technology; Vasyl Stefanyk Precarpathian National University; Shevchenko Street 57 76018 Ivano-Frankivsk Ukraine
2. Analytical Laboratory of the Faculty of Chemistry; Maria Curie-Sklodowska University; M. Curie-Sklodowska Square 3 20031 Lublin Poland
3. Department of Physics of Metals; Ivan Franko Lviv National University; Kyrylo and Mefodiy Street 8 79005 Lviv Ukraine
4. G.V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine; 36 Acad. Vernadsky Boulevard 03680 Kyiv Ukraine