Characterization of a fluorinated chiral liquid-crystal material displaying large electroclinic effect

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Abstract

The phase sequence, the electrical, and electro-optical properties of a novel fluorinated chiral liquid crystal material are presented. At room temperature, the material is in the S* C phase with a tilt angle of 23°. The tilt decreases with increasing temperature and vanishes at 57°C where the material displays an phase. In the S* A phase, the material displays a large electroclinic effect with a concomitant increase in birefringence similar to that observed in the de Vries phases. At 58°C, a tilt of almost 20° can be induced with a field of 14Vμm -1. A large electroclinic effect is also observed in the S* C phase; at any temperature the tilt can be increased to its room temperature value with a sufficiently large field.

Original languageEnglish
Pages (from-to)353-357
Number of pages5
JournalPhase Transitions
Volume85
Issue number4
DOIs
Publication statusPublished - Apr 1 2012

Keywords

  • de Vries phase
  • electroclinic effect
  • ferroelectric
  • smectic

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)

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