SPECTROSCOPIC AND MAGNETIC-PROPERTIES OF GADOLINIUM LAVES-PHASE COMPOUNDS

X-ray photoemission spectra (XPS) and magnetic susceptibility of a ser ies of isostructural Laves-phase alloys Gd(Al1-xMx)2 for M = Si, Cu, P d, Ag, In, Pb, Sn, Ge, Sb, Ga (x less-than-or-equal-to 0.3) were exper imentally investigated. The experimental data are compared with the re sults of ab-initio electronic structure calculations using the selfcon sistent scalar-relativistic spin-polarized LMTO method for dopand conc entrations x = 0 and x = 0.25. As compared to the experimental XPS spe ctra, calculated f-peaks of Gd are shifted significantly toward the Fe rmi level E(F). Energetic positions of dopand d-peaks near E(F) are be tter reproduced. The experimentally observed decrease of the paramagne tic Curie temperature theta(p) for increasing dopand concentration x c an be explained by a decrease of the density of states (DOS) at the Fe rmi level E(F).