EFFECTS OF VOLUME AND ELECTRONIC CONCENTRATION ON THE CE(PD1-XMX) COMPOUNDS (M=NI, RH, AND AG)

High-field-magnetization, magnetic-susceptibility, specific-heat, elec trical-resistivity, lattice-parameter, L(III) x-ray absorption spectro scopy, and x-ray-absorption near-edge spectroscopy measurements are di scussed for Ce(Pd1-xMx) (M = Ni, Rh, and Ag) pseudoternary alloys. The Pd substitution by a holelike metal (Ni and Rh) induces the demagneti zation of the Ce atom by two different mechanisms: electronic concentr ation variation (DELTAZ, for M = Rh) and volume reduction (DELTAV, for M = Ni). The Pd substitution by an electronlike metal (Ag) induces dr astic changes in the magnetic structure with only a 2 at. % impurity. The experimental results indicate: (i) a continuous transformation fro m a ferromagnetic (F) to a nonmagnetic (NM) ground state induced by th e DELTAZ variation and (ii) a drastic transformation from F to NM, by the DELTAV change at a certain critical concentration. The ferromagnet ic-to-antiferromagnetic transition induced by Ag is described as due t o the variation of the charge screening at the nonmagnetic site.