TY - JOUR
T1 - Electrocaloric effect in ferroelectric polymers
AU - Lu, S. G.
AU - Rozic, B.
AU - Zhang, Q. M.
AU - Kutnjak, Z.
AU - Pirc, R.
N1 - Funding Information:
The authors want to dedicate this article to Professor Reimund Gerhard at the occasion of his 60th birthday. S.G.L. thanks E. Furman for stimulating discussions. 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. Research at JSI was supported by the Slovenian Research Agency under grants P1-0125, P2-0105, and J1-2015.
PY - 2012/6
Y1 - 2012/6
N2 - 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.
AB - 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.
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U2 - 10.1007/s00339-012-6830-9
DO - 10.1007/s00339-012-6830-9
M3 - Article
AN - SCOPUS:84862797495
SN - 0947-8396
VL - 107
SP - 559
EP - 566
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 3
ER -