TY  - JOUR
A1  - Raman Venkatesan, Thulasinath
A1  - Smykalla, David
A1  - Ploss, Bernd
A1  - Wübbenhorst, Michael
A1  - Gerhard, Reimund
T1  - Non-linear dielectric spectroscopy for detecting and evaluating structure-property relations in a P(VDF-TrFE-CFE) relaxor-ferroelectric terpolymer
JF  - Applied physics : A, Materials science & processing
N2  - Non-linear dielectric spectroscopy (NLDS) is employed as an effective tool to study relaxation processes and phase transitions of a poly(vinylidenefluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) relaxor-ferroelectric (R-F) terpolymer in detail. Measurements of the non-linear dielectric permittivity epsilon 2 ' reveal peaks at 30 and 80 degrees C that cannot be identified in conventional dielectric spectroscopy. By combining the results from NLDS experiments with those from other techniques such as thermally stimulated depolarization and dielectric-hysteresis studies, it is possible to explain the processes behind the additional peaks. The former peak, which is associated with the mid-temperature transition, is found in all other vinylidene fluoride-based polymers and may help to understand the non-zero epsilon 2 ' values that are detected on the paraelectric phase of the terpolymer. The latter peak can also be observed during cooling of P(VDF-TrFE) copolymer samples at 100 degrees C and is due to conduction and space-charge polarization as a result of the accumulation of real charges at the electrode-sample interface.
KW  - Non-linear dielectric spectroscopy
KW  - P(VDF-TrFE-CFE)
KW  - Relaxor-ferroelectric polymer
KW  - Dielectric hysteresis
KW  - Curie-transition
KW  - Mid-temperature transition
Y1  - 2021
U6  - https://doi.org/10.1007/s00339-021-04876-0
SN  - 0947-8396
SN  - 1432-0630
VL  - 127
IS  - 10
PB  - Springer
CY  - Berlin ; Heidelberg ; New York
ER  -