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Type: Artigo de periódico
Title: Thermodynamic and electronic transport properties of CeNiIn2
Author: Rojas, DP
da Silva, LM
Gandra, FG
Seica, JP
Lopes, EB
Pereira, LCJ
Waerenborgh, JC
Abstract: Thermodynamic and transport properties of CeNiIn2 are reported. The results indicate that this system undergoes a magnetic transition at T-C = 3.4 K. A Kondo temperature T-K = 2.7 K was also estimated. The electronic coefficient gamma approximate to 1 J/mol K-2, calculated from specific heat data, is characteristic for heavy-fermion systems and is consistent with the estimated T-K. For T < T-C, the specific heat and resistivity data are better described if an additional contribution from he spin waves with a gap in the magnon spectrum is considered. Crystal field parameters Delta(1) = 80 K and Delta(2) greater than or equal to 200 K were estimated from the temperature dependence of specific heat above T-C. The results obtained for this compound are explained as an interplay of the anisotropy and the competition between RKKY interaction and Kondo effect. (C) 2004 Elsevier B.V. All rights reserved.
Subject: Kondo effect
RKKY interaction
crystal field
heavy fermion
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.physb.2004.08.017
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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