Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3±δ

Manganites are one of only a small number of material families currently being trialled as room-temperature magnetic refrigerants. Here we examine the dependence of the thermal conductivity, κ, of La0.67Ca0.33MnO3±δ as a function of density, grain size and silver impregnation around room temperature...

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Bibliographic Details
Published in:Scripta materialia 2013-04, Vol.68 (7), p.510-513
Main Authors: Turcaud, J.A., Morrison, K., Berenov, A., Alford, N.McN, Sandeman, K.G., Cohen, L.F.
Format: Article
Language:English
Subjects:
Magnetic refrigeration
Magnetocalorics
Manganites
Silver
Thermal conductivity
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Summary:Manganites are one of only a small number of material families currently being trialled as room-temperature magnetic refrigerants. Here we examine the dependence of the thermal conductivity, κ, of La0.67Ca0.33MnO3±δ as a function of density, grain size and silver impregnation around room temperature. We use a simple effective medium model to extract relevant trends in the data and demonstrate a 3-fold increase in thermal conductivity by silver impregnation.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2012.11.036