Electrocaloric effect and dipolar entropy change in ferroelectric polymers

R. Pirc, B. Roi, Z. Kutnjak, R. Blinc, Xinyu Li, Q. M. Zhang

    Research output: Contribution to journalArticlepeer-review

    5 Scopus citations

    Abstract

    The electrocaloric (EC) effect in normal ferroelectric copolymer P(VDF-TrFE) and in relaxor terpolymer P(VDF-TrFE-CFE) is described in the framework of a phenomenological appoach. The change of the dipolar entropy in the copolymer, derived earlier from dielectric measurements by means of the Maxwell relation, is analyzed in terms of the mean field expression for entropy, and is shown to be consistent with the dielectric data. In the terpolymer case, the entropy change determined recently by direct (EC) measurements is found to be in qualitative agreement with the predictions of the mesoscopic spherical model of relaxor ferroelectrics.

    Original languageEnglish (US)
    Pages (from-to)38-44
    Number of pages7
    JournalFerroelectrics
    Volume426
    Issue number1
    DOIs
    StatePublished - Jan 1 2012

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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