Electrocaloric effect in ferroelectric polymers

S. G. Lu, B. Rozic, Qiming Zhang, Z. Kutnjak, R. Pirc

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    38 Scopus citations

    Abstract

    The electrocaloric effect (ECE) of poly (vinyledene fluoride- trifluoroethylene) (P(VDF-TrFE)) 55/45 mol% copolymers was directly measured, which confirms the results deduced from Maxwell relation. The adiabatic temperature change δT under a given electric field peaks at the ferroelectric-paraelectric (FE-PE) transition. Away from it, ECE becomes small. δT versus applied electric field can be described well by a modified Belov- Goryaga equation. The ECE in ferroelectric polymers, especially near FE-PE transition where larger ECE is observed, are analyzed under different boundary conditions employing phenomenological theory and constitutive equations. The secondary pyroelectricity is found to play a significant role which enhances ECE in ferroelectric polymers.

    Original languageEnglish (US)
    Pages (from-to)559-566
    Number of pages8
    JournalApplied Physics A: Materials Science and Processing
    Volume107
    Issue number3
    DOIs
    StatePublished - Jun 1 2012

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Materials Science(all)

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