Comparison of directly and indirectly measured electrocaloric effect in relaxor ferroelectric polymers

S. G. Lu, B. Rožič, Qiming Zhang, Z. Kutnjak, R. Pirc, Minren Lin, Xinyu Li, Lee Gorny

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    153 Scopus citations

    Abstract

    We report the directly measured electrocaloric effect (ECE) (the adiabatic temperature change ΔT) of relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer and its blend with poly(vinylidene fluoride-chlorotrifluoroethylene). The results show that the directly measured ΔT in the relaxor terpolymer is much larger than that deduced from Maxwell relation and that the relaxor terpolymer possesses a giant ECE at room temperature. The large difference between the directly measured ΔT and that deduced indicates that the Maxwell relation, which is derived for ergodic systems, is not suitable for deducing ECE in the relaxor ferroelectric polymers, which are nonergodic (polar-glass) material systems.

    Original languageEnglish (US)
    Article number202901
    JournalApplied Physics Letters
    Volume97
    Issue number20
    DOIs
    StatePublished - Nov 15 2010

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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