Low-temperature thermal and transport properties of single-crystalline Ce$_{4}$Pt$_{12}$Sn$_{25}$

ORAL

Abstract

Low-temperature specific heat $C(T)$ and electrical resistivity \textit{$\rho $}($T)$ measurements have been performed on a flux-grown single-crystalline Ce$_{4}$Pt$_{12}$Sn$_{25 }$which has a body-centered cubic structure. As temperature decreased, $C(T)$ increased and showed a huge jump ($\Delta C$/$T\sim $43J/mole-K$^{2}$-Ce) at $T \quad \sim $ 0.2 K, probably due to a magnetic ordering. The entropy gain connected with the ordering reaches a half of $R$ln2 at the peak position and almost full $R$ln2 at 3 K, corresponding to the degeneracy of the fundamental crystal-field doublet. On the other hand, \textit{$\rho $}($T)$ showed metallic behavior and decreased rapidly around the ordering temperature with a clear kink. We will also discuss the results of external-field effect on this compound.

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Authors

  • Nobuyuki Kurita

    • Los Alamos National Laboratory

  • H. Lee

    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
    • Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, NM 87544

  • Yoshifumi Tokiwa

    • Los Alamos National Laboratory

  • Eric Bauer

    • MPA-10, LANL, Los Alamos, NM, USA
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
    • Los Alamos National Laboratory
    • UC-Irvine
    • LANL

  • Joe Thompson

    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
    • Los Alamos National Laboratory

  • Zachary Fisk

    • Department of Physics, University of California Davis

  • Pei-Chun Ho

    • Department of Physics and Institute for Pure and Applied Physical Sciences, University of California-San Diego
    • Physics/CSU-Fresno
    • Department of Physics, Cal. State U., Fresno

  • M. Brian Maple

    • University of California, San Diego
    • Department of Physics and Institute for Pure and Applied Physical Sciences, University of California-San Diego
    • Department of Physics and Institute of Pure and Applied Physical Sciences, University of California, San Diego
    • UCSD

  • Roman Movshovich

    • MPA-10, LANL, Los Alamos, NM, USA
    • Los Alamos National Laboratory