Observation and investigation of the ferrielectric subphase with high [formula presented] parameter

Yu P. Panarin, O. Kalinovskaya, J. K. Vij, J. W. Goodby

Research output: Contribution to journalArticlepeer-review

Abstract

Dielectric relaxation processes in an antiferroelectric liquid crystal (AFLC) have been investigated over a wide range of frequencies from 1 Hz to 1 GHz. The AFLC under investigation possesses a variety of different ferrielectric, ferroelectric, and antiferroelectric phases. Dielectric and polarization measurements under direct bias voltage have been made with a view to clarifying the origin of the high-temperature ferrielectric phase, which appears between the AF and smectic-C phases. This phase is assigned to an unstable ferrielectric phase with [formula presented] parameter greater than 1/2 (according to the Ising model) or a doubly modulated incommensurate phase (according to the expanded Landau model). The results are also supported by conoscopy.

Original languageEnglish
Pages (from-to)4345-4353
Number of pages9
JournalPhysical Review E
Volume55
Issue number4
DOIs
Publication statusPublished - 1997
Externally publishedYes

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