Spin fluctuations in the skutterudite compound LaFe4Sb12

  • R. Viennois
  • S. Charar
  • D. Ravot
  • P. Haen
  • A. Mauger
  • A. Bentien
  • S. Paschen
  • F. Steglich
Solid and Condensed State Physics

Abstract.

We report transport, magnetic and thermodynamic properties of the skutterudite compound LaFe4Sb12. The basic features are a large magnetic susceptibility χ(T), and large electronic coefficient γ of the heat capacity. In particular, a T1.35, T1.7, and T-2/3 temperature dependence of the magnetic susceptibility χ(T), resistivity ρ(T), and Grüneisen parameter Γ(T), respectively, is found at low temperature. An overall understanding of these physical properties is achieved, assuming that LaFe4Sb12 is a non-Fermi liquid system close to a ferromagnetic quantum critical point, with a spin fluctuation temperature Tsf=50±15 K.

Keywords

Spectroscopy Neural Network State Physics Heat Capacity Complex System 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • R. Viennois
    • 1
  • S. Charar
    • 1
  • D. Ravot
    • 2
  • P. Haen
    • 3
  • A. Mauger
    • 4
  • A. Bentien
    • 5
  • S. Paschen
    • 5
  • F. Steglich
    • 5
  1. 1.Groupe d’Étude des Semiconducteurs (Laboratoire associé au Centre National de la Recherche Scientifique) , Université de Montpellier IIMontpellier CedexFrance
  2. 2.Laboratoire de Physicochimie de la Matière Condensée, Université de Montpellier IIMontpellier CedexFrance
  3. 3.Centre de Recherche des Basses températures, CNRS, 25 Avenue des Martyrs, BP 166GrenobleFrance
  4. 4.Fédération de Recherche Matière et Systèmes Complexes, 140 rue de LourmelParisFrance
  5. 5.Max Planck Institut für Chemische Physik festerStoffeDresdenGermany

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