ac-Field-Induced Grandjean Plane Texture in Mixtures of Room-Temperature Nematics and Cholesterics

Abstract

The influence of ac fields on liquid-crystal mixtures of the nematic anisylidene-$p\ensuremath{-}n$- butylaniline (ABUTA) and the cholesteric oleyl cholesteryl carbonate was investigated. It was established that the cholesteric Grandjean plane texture could be induced with fields of the order of 2.5\ifmmode\times\else\texttimes\fi{}${10}^{5}$ ${\mathrm{V}}_{\mathrm{rms}}$/cm at frequencies above 0.1 kHz for samples containing 40% ABUTA. With larger ABUTA contents the frequency required to produce the Grandjean texture increased.