Magnetic properties and pressure dependence of the Curie temperature of LaCo5xCu5−5x

Abstract
The magnetic properties of the series LaCo5xCu5−5x were studied. All compounds were found to crystallize in the hexagonal CaCu5 structure type. As a function of composition x the following properties were determined: the lattice constants, the Curie temperatures and their pressure dependence up to 40 kbar, the anisotropy fields, the saturation moments at 4.2 K, and the initial compressibilities. Attempts have been made to explain the variation of the magnetic properties in terms of the collective electron model with a 3d band shape that depends on Cu concentration, taking account, however, of a certain extent of localization of the 3d electrons.