1. Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, Lviv Scientific Research Institute of Materials of SRC “Carat”, 202 Stryjska str., Lviv, UA-79031, Ukraine, and Institute of Physics of Jan Dlugosz University, 13/15, al. Armii Krajowej, Czestochowa, PL-42201, Poland