Magnetic properties of Y/sub 2/Fe/sub 17-x/M/sub x/N/sub y/ compounds, with M=Mo, V or Ti

Abstract

Results of X-ray diffraction studies and magnetic measurements performed on Y/sub 2/Fe/sub 17-x/M/sub x/ compounds (M=Mo,V or Ti) and their nitrides are reported. By nitrogenation of the parent alloys, the lattice parameters increase significantly, this fact determining a substantial increase of the Curie temperature. The volume effects on the variation of Curie temperatures in Y/sub 2/Fe/sub 17-x/M/sub x/N/sub y/ decrease when increasing M content. The dlnT/sub c//dlnV values show a linear dependence on the Curie temperatures. The experimental data are analysed in a model which supposes that the greatest fraction of iron 3d electrons are localized.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>