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Type: Artigo de periódico
Title: Transition From Kondo To Intermediate Valence Regime In (la1-xcex)ni: An Esr Study
Author: Medina A.N.
Gandra F.G.
Azanha W.R.
Cardoso L.P.
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 xc 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 JCe-Gd = 4.8 meV and the Ce-conduction electron exchange parameter \Jf-s\ = 19 meV, for x = 1.
Rights: fechado
Identifier DOI: 10.1088/0953-8984/10/43/020
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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