Effects of volume and electronic concentration on the Ce(Pd1xMx) compounds (M=Ni, Rh, and Ag)

J. G. Sereni, E. Beaurepaire, and J. P. Kappler
Phys. Rev. B 48, 3747 – Published 1 August 1993
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Abstract

High-field-magnetization, magnetic-susceptibility, specific-heat, electrical-resistivity, lattice-parameter, LIII x-ray absorption spectroscopy, and x-ray-absorption near-edge spectroscopy measurements are discussed for Ce(Pd1xMx) (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 (ΔZ, for M=Rh) and volume reduction (ΔV, 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 ΔZ variation and (ii) a drastic transformation from F to NM, by the ΔV 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.

  • Received 1 March 1993

DOI:https://doi.org/10.1103/PhysRevB.48.3747

©1993 American Physical Society

Authors & Affiliations

J. G. Sereni

  • Comisión Nacional de Energía Atomíca, Centro Atómico Bariloche, 8400 S.C. de Bariloche, Argentina

E. Beaurepaire and J. P. Kappler

  • Institut de Physique et Chimie des Materiaux de Strasbourg(enGroupe d’Etude des Materiaux Métalliques, 4 rue Blaise Pascal, 67070 Strasbourg, France

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Vol. 48, Iss. 6 — 1 August 1993

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