Electrocaloric effect and dipolar entropy change in ferroelectric polymers

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

doi:10.1080/00150193.2012.671101

Electrocaloric effect and dipolar entropy change in ferroelectric polymers

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

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

6 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 language	English (US)
Pages (from-to)	38-44
Number of pages	7
Journal	Ferroelectrics
Volume	426
Issue number	1
DOIs	https://doi.org/10.1080/00150193.2012.671101
State	Published - Jan 1 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1080/00150193.2012.671101

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title = "Electrocaloric effect and dipolar entropy change in ferroelectric polymers",

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.",

author = "R. Pirc and B. Roi and Z. Kutnjak and R. Blinc and Xinyu Li and Zhang, {Q. M.}",

note = "Funding Information: This work was supported by the Slovenian Research Agency through Grants P1-0044, P1-0125, P2-0105, J1-0155, and J1-2015. Research at the Pennsylvania State University was supported by the US DoE, Office of Basic Energy Sciences, Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410.",

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doi = "10.1080/00150193.2012.671101",

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T1 - Electrocaloric effect and dipolar entropy change in ferroelectric polymers

AU - Pirc, R.

AU - Roi, B.

AU - Kutnjak, Z.

AU - Blinc, R.

AU - Li, Xinyu

AU - Zhang, Q. M.

N1 - Funding Information: This work was supported by the Slovenian Research Agency through Grants P1-0044, P1-0125, P2-0105, J1-0155, and J1-2015. Research at the Pennsylvania State University was supported by the US DoE, Office of Basic Energy Sciences, Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - 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.

AB - 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.

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SP - 38

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JO - Ferroelectrics

JF - Ferroelectrics

IS - 1

ER -

Electrocaloric effect and dipolar entropy change in ferroelectric polymers

Abstract

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