Antiferroelectric Low Molar Mass Organosiloxane Liquid Crystals: A Phenomenological Model

C. Carboni, H. J. Coles

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have established that the antiferroelectric order observed in low molar mass organosiloxane liquid crystal materials with chiral bi-mesogen molecules is due to the bent conformation of the molecules rather than to co-operative antiferroelectric interactions. The switching between antiferroelectric and ferroelectric order involves a change of conformation of the molecules. We show that in mixtures of antiferroelectric and ferroelectric molecules this concept can be used to vary continuously the threshold field for antiferroelectric switching. We propose a simple model to describe the behaviour of the materials and to predict the threshold field.

Original languageEnglish
Pages (from-to)349-356
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume328
Publication statusPublished - 1999

Fingerprint

Liquid Crystals
Molar mass
Liquid crystals
liquid crystals
Molecules
Ferroelectric materials
Conformations
molecules
thresholds
interactions

Keywords

  • Antiferroelectric
  • Organosiloxane
  • Thresholdless switching

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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AU - Coles, H. J.

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AB - We have established that the antiferroelectric order observed in low molar mass organosiloxane liquid crystal materials with chiral bi-mesogen molecules is due to the bent conformation of the molecules rather than to co-operative antiferroelectric interactions. The switching between antiferroelectric and ferroelectric order involves a change of conformation of the molecules. We show that in mixtures of antiferroelectric and ferroelectric molecules this concept can be used to vary continuously the threshold field for antiferroelectric switching. We propose a simple model to describe the behaviour of the materials and to predict the threshold field.

KW - Antiferroelectric

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KW - Thresholdless switching

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