Electrohydrodynamic Instabilities in the Liquid Crystalline Phases with Smectic Ordering
نویسندگان
چکیده
An investigation has been made of the frequency characteristics of the threshold voltage of domain instabilities induced by an electric field in both homogeneously and homeotropically oriented liquid crystal layers. The mesogens had the nematic and smectic A phases and their anisotropy of the electrical conductivity changed its sign at the critical temperature somewhat above the nematic-smectic transition point. All the instabilities observed were of the electrohydrodynamic nature. The experimental results were accounted for in terms of the isotropic and CarrHelfrich mechanisms.
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