Low-temperature anomalies in magnetic, transport, and thermal properties of single-crystal CeRhSn with valence fluctuations

S. Kim, Y. Echizen, K. Umeo, S. Kobayashi, M. Sera, S. Salamakha, L. Sologub, T. Takabatake, X. Chen, T. Tayama, T. Sakakibara, H. Jung, B. Maple

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58 Scopus citations

Abstract

Magnetic, transport, thermal, and crystallographic properties are reported for single crystals of CeRhSn crystallizing in the hexagonal ZrNiAl-type structure. We found high anisotropy in both electrical resistivity (ρa≈5ρc at 70 K) and magnetic susceptibility (χc≈10χa at 0.4 K), which is atypical for a valence-fluctuating Ce compound. At low temperatures, ρ(T) and χ(T) show power-law behaviors; ρa(T)∝T1.5 and ρc(T)∝T, and χa∝T−0.35 and χc∝T−1.1 down to 0.4 K. These behaviors and the rather large residual resistivity were not affected by long-term annealing. On cooling from 7 K to 0.5 K, the specific heat divided by temperature C/T increased as -ln T and saturated to a rather large value of 0.2 J/mol K2. These experimental results are discussed in relation to the possible atomic disorder.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number5
DOIs
StatePublished - 2003/08/05

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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