NDLI: Growth dynamics of ferroelectric domains in chiral hexatic liquid crystals

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Growth dynamics of ferroelectric domains in chiral hexatic liquid crystals

Content Provider	Scilit
Author	Dierking, I. Ghosh, A. K. Haase, W.
Copyright Year	2001
Description	Journal: Journal of Physics: Condensed Matter The dynamics and anisotropy of ferroelectric domain growth was studied in situ for a tilted hexatic liquid crystal phase (SmI*) as a function of electric field amplitude, frequency and temperature. Domain growth proceeds parallel and perpendicular to the smectic layer plane (not the direction of uniform rubbing), with domain wall mobilities being several times larger in the direction parallel to the layers as compared to the perpendicular direction. Domain wall velocities were determined directly by digital image analysis of the wall displacement, as well as indirectly by determination of the fraction of switched sample area and analysis by a modified Avrami equation. Using a special smectic layer configuration known as horizontal chevrons, we additionally studied the effect of elastic anchoring interactions on the ferroelectric domain growth process, i.e. switching into the direction of preferred anchoring (rubbing direction) and out of it. The former process, which is elastically favoured, is one order of magnitude faster than the latter process, which is elastically hindered. This behaviour is confirmed by the estimation of an effective activation energy for the domain wall displacement for both switching processes.
Related Links	http://iopscience.iop.org/article/10.1088/0953-8984/13/46/305/pdf
Ending Page	10331
Page Count	11
Starting Page	10321
ISSN	09538984
e-ISSN	1361648X
DOI	10.1088/0953-8984/13/46/305
Journal	Journal of Physics: Condensed Matter
Issue Number	46
Volume Number	13
Language	English
Publisher	IOP Publishing
Publisher Date	2001-11-05
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Condensed Matter Ferroelectric Domain Hexatic Liquid Crystal
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science

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