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Your search keyword '"Shape instability"' showing total 2 results
Start Over Descriptor "Shape instability" Topic ferroelectric materials
2 results on '"Shape instability"'

1. Topological instability of the ferroelectric domain wall caused by screening retardation.

Author

Udalov, A. R., Korzhenevskii, A. L., and Shur, V. Ya.

Subjects
*FERROELECTRICITY, *DOMAIN walls (Ferromagnetism), *FERROELECTRIC materials, *POLARIZATION spectroscopy, *CAPACITORS
Abstract

In this paper, we established the origin of the experimentally observed topological instability representing the change of the plane domain wall shape by formation of so-called “fingers” during fast polarization reversal of the ferroelectric capacitor. By means of a simplified model we show that the topological instability of the domain wall can be attributed to retardation of the bulk screening of residual depolarization field. [ABSTRACT FROM PUBLISHER]

Published
2017
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2. Domain shape instabilities and dendrite domain growth in uniaxial ferroelectrics

Author

A. R. Akhmatkhanov and Vladimir Ya. Shur

Subjects
Materials science, General Mathematics, SHAPE INSTABILITY, Lithium niobate, General Physics and Astronomy, FERROELECTRICITY, 02 engineering and technology, 01 natural sciences, Domain (software engineering), Condensed Matter::Materials Science, Domain wall (string theory), chemistry.chemical_compound, Dendrite (crystal), DOMAIN KINETICS, FERROELECTRIC DOMAIN STRUCTURE, 0103 physical sciences, FERROELECTRIC MATERIALS, DOMAIN WALLS, DENDRITIC PATTERNS, LITHIUM NIOBATE, LITHIUM TANTALATE, 010302 applied physics, FERROELECTRICS, KINETIC APPROACH, Condensed matter physics, Section 1: Microscopic Analysis, General Engineering, 021001 nanoscience & nanotechnology, chemistry, Lithium tantalate, NIOBIUM COMPOUNDS, SWITCHING CONDITIONS, 0210 nano-technology, DOMAIN STRUCTURE
Abstract

The effects of domain wall shape instabilities and the formation of nanodomains in front of moving walls obtained in various uniaxial ferroelectrics are discussed. Special attention is paid to the formation of self-assembled nanoscale and dendrite domain structures under highly non-equilibrium switching conditions. All obtained results are considered in the framework of the unified kinetic approach to domain structure evolution based on the analogy with first-order phase transformation. This article is part of the theme issue ‘From atomistic interfaces to dendritic patterns’. © 2018 The Author(s) Published by the Royal Society. All rights reserved. 14-12-00826 Data accessibility. This article has no additional data. Authors’ contributions. V.Ya.S. and A.R.A. wrote this in a joint effort. Competing interests. We declare we have no competing interests. Funding. The authors acknowledge support by the Russian Scientific Foundation (grant no. 14-12-00826). Acknowledgements. It is a pleasure to acknowledge the helpful discussions with A.L. Korzhenevskii and E.L. Rumyantsev. The equipment of the Ural Center for Shared Use ‘Modern nanotechnology’ UrFU was used.

Published
2018
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