| Affiliation: | (1) Groupe d’Étude des Semiconducteurs (Laboratoire associé au Centre National de la Recherche Scientifique) , Université de Montpellier II, pl. Eugène Bataillon, 34095 Montpellier Cedex, France;(2) Laboratoire de Physicochimie de la Matière Condensée, Université de Montpellier II, pl. Eugène Bataillon, 34095 Montpellier Cedex, France;(3) Centre de Recherche des Basses températures, CNRS, 25 Avenue des Martyrs, BP 166, 38042 Grenoble, France;(4) Fédération de Recherche Matière et Systèmes Complexes, 140 rue de Lourmel, 75015 Paris, France;(5) Max Planck Institut für Chemische Physik festerStoffe, Nothnitzer Str. 40, 01187 Dresden, Germany |
| Abstract: | We report transport, magnetic and thermodynamic properties of theskutterudite compound LaFe4Sb12. The basic features are a largemagnetic susceptibility χ(T), and large electronic coefficientγ of the heat capacity. In particular, a T1.35, T1.7, andT-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 thatLaFe4Sb12 is a non-Fermi liquid system close to a ferromagnetic quantum critical point, with a spin fluctuation temperature Tsf=50±15 K. |
