Electrocaloric effect of the relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer

Bret Neese; S. G. Lu; Baojin Chu; Q. M. Zhang

doi:10.1063/1.3077189

Electrocaloric effect of the relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer

Bret Neese, S. G. Lu, Baojin Chu, Q. M. Zhang

Electrical Engineering

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Abstract

We investigate the temperature dependence of the electrocaloric effect in a relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene- chlorofluoroethylene) terpolymer and show that the isothermal entropy change ΔS is proportional to the square of the electric displacement D (ΔS=-1/2ΒΔ D²) and the coefficient Β increases with temperature. This temperature dependent behavior of Β is caused by the ferroelectric relaxor nature of the polymer in which the polarization response from the nanopolar regions does not generate much entropy change. Consequently, the electrocaloric effect in the relaxor ferroelectric terpolymer is smaller than that in the normal ferroelectric copolymer.

Original language	English (US)
Article number	042910
Journal	Applied Physics Letters
Volume	94
Issue number	4
DOIs	https://doi.org/10.1063/1.3077189
State	Published - 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3077189

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title = "Electrocaloric effect of the relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer",

abstract = "We investigate the temperature dependence of the electrocaloric effect in a relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene- chlorofluoroethylene) terpolymer and show that the isothermal entropy change ΔS is proportional to the square of the electric displacement D (ΔS=-1/2ΒΔ D2) and the coefficient Β increases with temperature. This temperature dependent behavior of Β is caused by the ferroelectric relaxor nature of the polymer in which the polarization response from the nanopolar regions does not generate much entropy change. Consequently, the electrocaloric effect in the relaxor ferroelectric terpolymer is smaller than that in the normal ferroelectric copolymer.",

author = "Bret Neese and Lu, {S. G.} and Baojin Chu and Zhang, {Q. M.}",

note = "Funding Information: The authors wish to thank Eugene Furman for discussions. This work was supported by the Department of Energy through Grant No. DE-FG02-07ER46410.",

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T1 - Electrocaloric effect of the relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer

AU - Neese, Bret

AU - Lu, S. G.

AU - Chu, Baojin

AU - Zhang, Q. M.

N1 - Funding Information: The authors wish to thank Eugene Furman for discussions. This work was supported by the Department of Energy through Grant No. DE-FG02-07ER46410.

PY - 2009

Y1 - 2009

N2 - We investigate the temperature dependence of the electrocaloric effect in a relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene- chlorofluoroethylene) terpolymer and show that the isothermal entropy change ΔS is proportional to the square of the electric displacement D (ΔS=-1/2ΒΔ D2) and the coefficient Β increases with temperature. This temperature dependent behavior of Β is caused by the ferroelectric relaxor nature of the polymer in which the polarization response from the nanopolar regions does not generate much entropy change. Consequently, the electrocaloric effect in the relaxor ferroelectric terpolymer is smaller than that in the normal ferroelectric copolymer.

AB - We investigate the temperature dependence of the electrocaloric effect in a relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene- chlorofluoroethylene) terpolymer and show that the isothermal entropy change ΔS is proportional to the square of the electric displacement D (ΔS=-1/2ΒΔ D2) and the coefficient Β increases with temperature. This temperature dependent behavior of Β is caused by the ferroelectric relaxor nature of the polymer in which the polarization response from the nanopolar regions does not generate much entropy change. Consequently, the electrocaloric effect in the relaxor ferroelectric terpolymer is smaller than that in the normal ferroelectric copolymer.

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Electrocaloric effect of the relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer

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