NUKLEONIKA 2004, 49(Supplement 3):s17-s12

Room temperature ⁵⁷Fe Mössbauer spectroscopy and X-ray diffraction measurements are reported for a series of Y_1-xTi_xFe₂ polycrystalline samples. Our research shows that except for x = 0 and x = 1, the samples are a mixture of two C15 and C14 pseudobinary Laves phases. Some Ti atoms occupy the crystallographic positions 8a characteristic of the Y atoms in the cubic C15 structure while the rest of them form the hexagonal C14 phase. However, the lattice constant dependencies on concentration x suggest the occurrence of Y atoms in the positions 4f characteristic of Ti atoms in the hexagonal C14 structure. The partial substitution of Ti atoms for Y atoms is responsible for the HMF changes in the cubic phase. Contrary to the situation taking place in the Zr_1-xTi_xFe₂ compounds, magnetic arrangement in the pseudobinary hexagonal phases is not observed at room temperature.