Abstract
The dynamic processes in electron-irradiated poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)], copolymer with a VDF content of 55 mol % have been studied by measurements of the temperature and frequency-dependent linear $({\ensuremath{\varepsilon}}_{1})$ and third-order nonlinear $({\ensuremath{\varepsilon}}_{3})$ dielectric constants. Analysis of the complex linear dielectric response by a temperature-frequency plot has revealed that the longest relaxation time diverges at $T=277\mathrm{K},$ while the bulk of the relaxation times remains finite below this freezing temperature. Such an asymmetric behavior is, together with the temperature dependence of the static field-cooled dielectric constant, very similar to that observed in classical relaxor systems, such as lead magnesium niobate and lanthanum lead zirconate titanate, and is reminiscent of the dynamic behavior observed in various spin glasses. In addition, a paraelectric-to-glass crossover in the temperature dependence of the dielectric nonlinearity ${a}_{3}={\ensuremath{\varepsilon}}_{3}/{\ensuremath{\varepsilon}}_{0}^{3}{\ensuremath{\varepsilon}}_{1}^{4},$ typical for relaxors, has been observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
