Critical Dependence of Polarization Phenomena on Conductivity in Ferroelectric Polymers

Authors S.N. Fedosov1, H. von Seggern2
Affiliations

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

Е-mail [email protected], [email protected]
Issue Volume 5, Year 2013, Number 4
Dates Received 11 June 2013; revised manuscript received 25 January 2014; published online 31 January 2014
Citation S.N. Fedosov, H. von Seggern, J. Nano- Electron. Phys. 5 No 4, 04056 (2013)
DOI
PACS Number(s) 77.84. – s, 77.84.Jd, 73.61.Ph
Keywords Polarization (6) , Сonductivity, Space charge (2) , PVDF (5) , Ferroelectric polymers.
Annotation 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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