The compound CeAl2, the pseudobinary systems Ce(Al1-xCux)2 and Ce(Al1-xNix)2 crystallize in cubic Lave s phases for x = 0.02 and 0.1. The Al-L2,3 and the Ce-N4,5→O2,3 emission spectra of these alloys have been measured using a computerized soft X-ray grating spectrometer. The influence of copper and nickel substitution on the Al-L2,3 emission band was studied as a function of the concentration x. The shift of the Al-L2,3 Fermi edge relative to the CeAl2 spectrum was determined as function of the effective 'charge density' c of copper and nickel substitution (c = xΔZ, ΔZ: valence difference with respect to Al). According to the small shift of the Fermi edge it is verified that the density of states at EF is high, which is in good agreement with band structure calculations.
ASJC Scopus subject areas