Mossbauer effect investigation of Y-Fe compounds

Mossbauer spectra were taken of the compounds YFe 2 , YFe 3 , Y 6 Fe 23 and Y 2 Fe 17 at temperatures ranging from 15K to well above the Curie temperatures (T c =540, 538, 496 and 358K, respectively). The various spectra were analysed by means of subspectra due to the different nonequivalent Fe sites occurring in these compounds. For each of these sites the temperature dependence of the hyperfine field was determined and shown to be similar for different sites within the same compound.