Critical Dependence of Polarization Phenomena on Conductivity in Ferroelectric Polymers

Автор(ы) S.N. Fedosov1, H. von Seggern2

1 Department of Physics and Materials Science, Odessa National Academy of Food Technologies, 112, Kanatnaya Str., 65039 Odessa, Ukraine

2 Institute of Materials Science, Darmstadt University of Technology, 23, Petersenstrasse, 64287 Darmstadt, Germany

Выпуск Том 5, Год 2013, Номер 4
Даты Получено 11.06.2013, в отредактированной форме – 25.01.2014, опубликовано online – 31.01.2014
Ссылка S.N. Fedosov, H. von Seggern, J. Nano- Electron. Phys. 5 No 4, 04056 (2013)
PACS Number(s) 77.84. – s, 77.84.Jd, 73.61.Ph
Ключевые слова Polarization (6) , Сonductivity, Space charge (2) , PVDF (4) , Ferroelectric polymers.
Аннотация Experimentally obtained data on the polarization dynamics in polyvinylidene fluoride, a typical ferroe-lectric polymer, are analyzed during initial poling, short circuiting and polarization switching. Considering a two-component structure of the samples, namely, presence of ferroelectric and non-ferroelectric phases, it is shown that value and stability of the ferroelectric polarization significantly depend on conductivity and space charges. Application of a simple two-layer theoretical model with an explicit conductivity allowed ex-plaining such important features, as slow development and switching of the ferroelectric polarization and a partial back-switching of the already formed polarization after short-circuiting of the sample.

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