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

S. G. Lu; B. Rožič; Q. M. Zhang; Z. Kutnjak; R. Pirc; Minren Lin; Xinyu Li; Lee Gorny

doi:10.1063/1.3514255

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

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

Electrical Engineering

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

188 Scopus citations

Abstract

We report the directly measured electrocaloric effect (ECE) (the adiabatic temperature change Δ_T) 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 language	English (US)
Article number	202901
Journal	Applied Physics Letters
Volume	97
Issue number	20
DOIs	https://doi.org/10.1063/1.3514255
State	Published - Nov 15 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3514255

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@article{7a264331d3cd484e93671ec376368d46,

title = "Comparison of directly and indirectly measured electrocaloric effect in relaxor ferroelectric polymers",

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.",

author = "Lu, {S. G.} and B. Ro{\v z}i{\v c} and Zhang, {Q. M.} and Z. Kutnjak and R. Pirc and Minren Lin and Xinyu Li and Lee Gorny",

note = "Funding Information: Research at The Pennsylvania State University was supported by the U.S. DOE, Office of Basic Energy Sciences, and Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410. Research at JSI was supported by the Slovenian Research Agency under Grant Nos. P1-0125, P2-0105, and J1-2015.",

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month = nov,

day = "15",

doi = "10.1063/1.3514255",

language = "English (US)",

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journal = "Applied Physics Letters",

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TY - JOUR

T1 - Comparison of directly and indirectly measured electrocaloric effect in relaxor ferroelectric polymers

AU - Lu, S. G.

AU - Rožič, B.

AU - Zhang, Q. M.

AU - Kutnjak, Z.

AU - Pirc, R.

AU - Lin, Minren

AU - Li, Xinyu

AU - Gorny, Lee

N1 - Funding Information: Research at The Pennsylvania State University was supported by the U.S. DOE, Office of Basic Energy Sciences, and Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410. Research at JSI was supported by the Slovenian Research Agency under Grant Nos. P1-0125, P2-0105, and J1-2015.

PY - 2010/11/15

Y1 - 2010/11/15

N2 - 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.

AB - 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.

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U2 - 10.1063/1.3514255

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VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 202901

ER -

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

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