Mössbauer and crystallographic study of DyFe3−<i>x</i> Ni<i>x</i> compounds

Abstract

Mössbauer and crystallographic investigations were carried out on DyFe3−x Nix compounds crystallizing in the PuNi3 type of structure. The hyperfine field observed at the iron sites shows a maximum at x =0.75. The 12-line spectrum observed at room temperature corresponding to the two different kinds of iron in the structure collapsed into a single six-line pattern at 4.2 K. Lattice parameter c shows a rapid decrease when x is increased beyond 2.0, but no such behavior was found in the a lattice parameter. The results of the x-ray and Mössbauer data are explained in terms of site preference and nonlocalized transition-metal moments, respectively.