INFLUENCE OF MECHANICAL MICRO-DEFECTS ON THE LOCAL POLARIZATION IN DEVICES BASED ON FERROELECTRICS

doi:10.26565/2312-4334-2016-2-02

A. T. Bogorosh National Technical University of Ukraine "Kyiv Polytechnic Institute" https://orcid.org/0000-0001-8807-1759
S. A. Voronov National Technical University of Ukraine "Kyiv Polytechnic Institute"
V. F. Mazanko Institute of Metal Physics. G.V. Kurdyumov NASU
I. O. Shmatko Institute of Metal Physics. G.V. Kurdyumov NASU
O. A. Shmatko Institute of Metal Physics. G.V. Kurdyumov NASU
A. G. Shayko-Shaikovsky Chernovitsky National University https://orcid.org/0000-0002-0818-5367

DOI: https://doi.org/10.26565/2312-4334-2016-2-02

Keywords: micro defects, polarization, ferroelectric, piezoelectric, domains

Abstract

The results of theoretical and experimental studies of the effect of the charged micro-defects on a local reversal in the polarized ferroelectric materials. Domain circuit formation given near the surface of charged defects, the surface temperature distribution of the reaction rate and concentration of solute at the surface of the ferroelectric during enteral studies. The changes of amplitude versus frequency wave oscillations and changes in the rate of reaction in the vicinity of the instability microdefect fluctuations, as well as the evolution of the self-oscillation mode, stable and unstable oscillation modes, taking into account features of the fine structure of the hysteresis loop of the local piezoelectric response due to the proximity of the defects. Experimental verification showed that the pulsed electrophysical effects on ferroelectric sample energy is consumed less, but the effect is higher.

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