Static Magnetization Studies on the Family of Compounds Cd1−xFexCr2S4

Abstract

Static magnetization measurements have been made on a number of compounds in the family Cd1−xFexCr2S4 for [Formula: see text]. The magnetic moments at 0 °K fall with increasing iron content. The ordering temperatures rise and the Curie–Weiss parameters fall with increasing iron content. There is a steady decrease in lattice parameter with increasing x. A simple model is proposed in which the extra antiparallel electron on the Fe2+ ion is delocalized. The band in which the electrons move is assumed to have a trap for electrons in the vicinity of the A sites. The trap allows ionic behavior at low temperatures while at higher temperatures the electrons are itinerant. The model allows a consistent understanding of the magnetic properties.