NUKLEONIKA 2007, 52(Supplement 1):S21-S28

THE INFLUENCE OF Co AND V SUBSTITUTION ON STRUCTURAL PROPERTIES OF FINEMET-TYPE ALLOYS

Tadeusz Szumiata1, Michał Gawroński1, Katarzyna Brzózka1, Bogumił Górka1, Pavol Sovák2, Gabriel Pavlík2

1 Department of Physics, Technical University of Radom, 54 Krasickiego Str., 26-600 Radom, Poland
2 Department of Experimental Physics, Faculty of Sciences, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

The effect of addition of Co and V on the hyperfine parameters of amorphous as well as nanocrystalline Finemet-type alloys has been studied by means of transmission Mössbauer spectrometry. It was stated that these elements infiltrate into crystalline grains in the course of crystallization, what causes alteration in structure. Different evolution of magnetic hyperfine field is reported in both cases and analyzed. In the series of alloys substituted by vanadium, the substantial paramagnetic component attributed to iron-poor regions in the amorphous remainder was found.