Thermal Conductivity of Ce₂Ru₃Ga₉ Compound

• Authors: M. Falkowski , A. Strydom
• Languages of publication: EN

Abstracts

EN

The Ce-based 2:3:9 series of compounds are known for strongly correlated 4f-electron behaviour. Here, we report for the first time a study of the thermal conductivity κ(T) in zero and 9 T magnetic field for Ce₂Ru₃Ga₉ across the temperature range 2 K ≤ T ≤ 300 K. The zero-field temperature dependence of κ(T) exhibits a pronounced maximum, characteristic for metals with large electronic mean free path and towards room temperature κ(T) starts behaving in a manner usually attributed to the enhanced electron-phonon coupling. Based on the Wiedemann-Franz law the electronic and lattice contributions to the thermal conductivity were estimated. In high temperature region a distinct step-like anomaly at T* = 203 K has been observed which signals a putative phase transition, probably of phononic or lattice origin. We furthermore discuss the effect of applied magnetic fields on the thermal transport in Ce₂Ru₃Ga₉.

Keywords

EN

61.05.cp; 63.20.kk; 72.15.Eb; 72.15.Jf

Discipline

• 72.15.Jf: Thermoelectric and thermomagnetic effects
• 61.05.cp: X-ray diffraction
• 63.20.kk: Phonon interactions with other quasiparticles
• 72.15.Eb: Electrical and thermal conduction in crystalline metals and alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 240-242

Dates

published

2015-02

Contributors

author

M. Falkowski

• Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa

author

A. Strydom

• Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa

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Identifiers

DOI

10.12693/APhysPolA.127.240