Physical properties of Ce 3-xTe 4 below room temperature

Andrew F. May, Michael A. McGuire, Claudia Cantoni, Brian C. Sales

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Abstract

The physical properties of polycrystalline Ce 3-xTe 4 were investigated by measurements of the thermoelectric properties, Hall coefficient, heat capacity, and magnetization. The fully filled, metallic x=0 compound displays a soft ferromagnetic transition near 4 K, and analysis of the corresponding heat capacity anomaly suggests a doublet ground state for Ce3 +. The transition is suppressed to below 2 K in the insulating x=0.33 composition, revealing that magnetic order in Ce 3-xTe 4 is driven by a Ruderman-Kittel-Kasuya-Yosida (RKKY)-type interaction. The thermoelectric properties trend with composition as expected from simple electron counting, and the transport properties in Ce 3Te 4 are observed to be similar to those in La 3Te 4. Trends in the low-temperature thermal conductivity data reveal that the phonons are efficiently scattered by electrons, while all compositions examined have a lattice thermal conductivity near 1.2 W/m K -1 at 200 K.

Original languageEnglish
Article number035135
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number3
DOIs
StatePublished - Jul 23 2012

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