NUKLEONIKA 2004, 49(Supplement 3):s53-s57
Katarzyna Brzózka1, Tadeusz Szumiata1, Michał Gawroński1, Bogumił Górka1, Anna Zorkovská2, Pavol Sovák2
1 Department of Physics, Technical University of Radom,
29 Malczewskiego Str., 26-600 Radom, Poland,
2 Department of Experimental Physics,
Faculty of Sciences, P. J. afárik University, Park Angelinum 9, 041 54 Koice, Slovakia
Structure and hyperfine interactions of amorphous and nanocrystalline FINEMET were investigated by means
of Mössbauer spectrometry. It was found that substitution of x iron atoms with aluminum ones
causes changes in the properties of both amorphous and nanocrystalline alloys as well as in the
structure of individual phases. The reduction of hyperfine magnetic field caused by atom substitution
is a non-linear function of x, unlike the linear dependence expected because of dilution.
Temperature studies reveal a double magnetic phase transition at 250°C and 330°C as well as point to
the variety of phases in the examined material.