In the search of new electrocaloric materials: Fast ion conductors

2015/08/19 by Claudio Cazorla, Cazorla, Claudio
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1508.04829

2 pages, 2 figures

arxiv created 2015/08/28 · arxiv updated 2015/08/31

Abstract

We analyse the effects of applying an electric field on the critical temperature, Ts, at which superionicity appears in archetypal fast ion conductor CaF2 by means of molecular dynamics simulations. We find that the onset of superionicity can be reduced by about 100K when relatively small electric fields of ~50KV/cm are employed. Under large enough electric fields, however, ionic conductivity is depleted. The normal to superionic phase transition is characterised by a large increase of entropy, thereby sizeable electrocaloric effects can be realised in fast ion conductors that are promising for solid-state cooling applications.

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