Abstract
Recent findings of a large electrocaloric (EC) effect in in polymeric and inorganic ferroelectric materials made this effect an attractive possibility in development of cooling or heating devices of new generation, which would be more environmentally friendly. We report a significant electrocaloric effect near the ferroelectric phase transition in substrate-free [Pb(Mg1/3Nb2/3)O3]1-x[PbTiO3]x (PMN-xPT) with x = 0.30 thick ceramic films on a platinum layer. A method and analysis of direct measurements of the large EC effect are presented. Results confirm that besides the large electrostrictive response already reported in similar self-standing films, the large EC effect of similar magnitude as found in bulk PMN-0.30PT ceramics exists in substrate-free thick films.
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