TY - JOUR
T1 - Electrical and thermal properties of vinylidene fluoride-trifluoroethylene- based polymer system with coexisting ferroelectric and relaxor states
AU - Casar, Goran
AU - Li, Xinyu
AU - Koruza, Jurij
AU - Zhang, Qiming
AU - Bobnar, Vid
N1 - Funding Information:
Acknowledgements This research was supported by the Slovenian Research Agency under program P1-0125 and by the U.S. DoE, Office of Basic Energy Sciences, Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410.
PY - 2013/11
Y1 - 2013/11
N2 - Dielectric, thermal, and electrocaloric investigations of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) copolymer, irradiated with high-energy electrons, are reported. While the ferroelectric copolymer is transformed into a relaxor system at high irradiation doses, dielectric investigations, particularly nonlinear dielectric experiments, i.e., temperature dependences of the second and the third harmonic dielectric response, clearly evidence that at lower doses ferroelectric and relaxor states coexist in the P(VDF-TrFE). This is confirmed by the differential scanning calorimetry, which further reveals the influence of irradiation on the copolymer crystallinity and melting point. Finally, it is shown that large electrocaloric response of VDF-TrFE-based polymers is further enhanced in systems with coexisting relaxor and normal ferroelectric states.
AB - Dielectric, thermal, and electrocaloric investigations of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) copolymer, irradiated with high-energy electrons, are reported. While the ferroelectric copolymer is transformed into a relaxor system at high irradiation doses, dielectric investigations, particularly nonlinear dielectric experiments, i.e., temperature dependences of the second and the third harmonic dielectric response, clearly evidence that at lower doses ferroelectric and relaxor states coexist in the P(VDF-TrFE). This is confirmed by the differential scanning calorimetry, which further reveals the influence of irradiation on the copolymer crystallinity and melting point. Finally, it is shown that large electrocaloric response of VDF-TrFE-based polymers is further enhanced in systems with coexisting relaxor and normal ferroelectric states.
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U2 - 10.1007/s10853-013-7602-4
DO - 10.1007/s10853-013-7602-4
M3 - Article
AN - SCOPUS:84883182132
SN - 0022-2461
VL - 48
SP - 7920
EP - 7926
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 22
ER -