Studies on Ce- and Eu-based mixed valent materials

Abstract

New Re-based alloys have been prepared by introducing boron in already known alloys. In some of these alloys, Ce and Eu have been shown to undergo a variation in their valence state. EuPd₃B exhibits an interesting behaviour, viz. a charge ordering similar to that in Eu₃S₄. CeRh₃B₂ and EuRh₃B₂ have been shown to order magnetically despite the fact that Ce is in mixed valence state and Eu is in trivalent (non-magnetic) state. Rh-d bands are presumably responsible for this behaviour. In EuNi₂P₂, Mössbauer resonance exhibits anomalous variation of the line width with temperature.