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Abstract |
High-field-magnetization, magnetic-susceptibility, specific-heat, electrical-resistivity, lattice-parameter, L(III) x-ray absorption spectroscopy, and x-ray-absorption near-edge spectroscopy measurements are discussed for Ce(Pd1-xMx) (M = Ni, Rh, and Ag) pseudoternary alloys. The Pd substitution by a holelike metal (Ni and Rh) induces the demagnetization of the Ce atom by two different mechanisms: electronic concentration variation (DELTAZ, for M = Rh) and volume reduction (DELTAV, for M = Ni). The Pd substitution by an electronlike metal (Ag) induces drastic changes in the magnetic structure with only a 2 at. % impurity. The experimental results indicate: (i) a continuous transformation from a ferromagnetic (F) to a nonmagnetic (NM) ground state induced by the DELTAZ variation and (ii) a drastic transformation from F to NM, by the DELTAV change at a certain critical concentration. The ferromagnetic-to-antiferromagnetic transition induced by Ag is described as due to the variation of the charge screening at the nonmagnetic site. |
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