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Type: Artigo de periódico
Title: Transition from Kondo to intermediate valence regime in (La1-x,Ce-x)Ni: an ESR study
Author: Medina, AN
Gandra, FG
Azanha, WR
Cardoso, LP
Abstract: We report on electron spin resonance (ESR) results for the series of compounds (La1-xCex)Ni doped with Gd. We show that from the Gd g-value and linewidth one can determine the concentration x(c) where the system goes from Kondo single impurity to Kondo lattice (and intermediate valence) regimes. The observed behaviour in both the g-value and the slope of the linewidth-T curves is explained using the indirect interaction between Gd and Ce moments. The calculation leads to the determination of the Ce-Gd exchange parameter J(Ce-Gd) = 4.8 meV and the Ce-conduction electron exchange parameter \J(f-s)\ = 19 meV, for x=1.
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: fechado
Identifier DOI: 10.1088/0953-8984/10/43/020
Date Issue: 1998
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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