Electrohydrodynamic Instability in Nematic Liquid Crystal Mixtures with Positive Dielectric Anisotropy

Abstract

Electrohydrodynamic instability in nematic liquid crystal mixtures of MBBA and EBCA with positive dielectric anisotropy has been investigated. Domain formation and their stability have been related to the magnitude of positive dielectric anisotropy. The sequence of various instabilities with respect to the variation of positive dielectric anisotropy of the nematic mixtures has been reported. The variation of threshold voltage for domain formation and dielectric alignment with dielectric anisotropy has been studied at moderately thick and thin samples. The instabilities observed in moderately thick and thin samples have been compared.