Thermal expansion and the Grüneisen parameter near the magnetic instability in

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, , Citation S Kambe et al 1997 J. Phys.: Condens. Matter 9 4917 DOI 10.1088/0953-8984/9/23/015

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1 Département de Recherche Fondamentale sur la Matière Condensée, SPSMS, CEA-CENG, 38054 Grenoble, France

2 Centre de Recherches sur les Trés Basses Température, CNRS, 38042 Grenoble, France

3 Van der Waals - Zeeman Institute, University of Amsterdam, 1018 XE Amsterdam, The Netherlands

Dates

  1. Received 3 January 1997

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0953-8984/9/23/4917

Abstract

The low-temperature thermal expansion of the heavy-fermion system with the formula (x = 0 and x = 0.05) close to the magnetic instability is analysed in terms of the renormalization group and self-consistent renormalized spin-fluctuation models. The Grüneisen parameter calculated using the renormalized Fermi temperature is compared with the effective one which is determined from thermal expansion measurements and previously obtained specific heat data.

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10.1088/0953-8984/9/23/015