EFFECTS OF ALLOYING ON THE MAGNETIC AND STRUCTURAL BEHAVIOUR OF CeFe₂

Abstract
Considerable attention has been given to the Laves phase compounds XFe₂. Two main groups are (a) those where X is a magnetic rare earth element and (b) those where X is non-magnetic and from groups III, IV or V (e.g. Y, Zr, Nb, etc.). In many respects CeFe₂ seems to belong to the second group but there are interesting structural and magnetic effects when Co, Al, Ru, Ir or Os are substituted for Fe. For all these substitutions ferromagnetism at low temperatures is rapidly lost to be replaced by canted spin structures or antiferromagnetism ; and, except for Co, at higher concentrations no ferromagnetism is found at any temperature. The results of recent magnetic, electrical and structural measurements will be discussed in relation to the properties of other XFe₂ alloys.