Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3+/-δ
arXiv:1210.0410 · doi:10.1016/j.scriptamat.2012.11.036
Abstract
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, K, 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 threefold increase in thermal conductivity by silver impregnation.
4 pages, 4 figures