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Dielectric spectroscopy of the twist grain boundary phase and smectic-like behaviour in the Isotropic Phase

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JournalLIQUID CRYSTALS
DatePublished - Sep 2005
Issue number8
Volume32
Number of pages7
Pages (from-to)1045-1051
Original languageEnglish

Abstract

Dielectric properties of a novel liquid crystal with direct transition from isotropic to twist grain boundary (TGB) phase were studied. Measurements were performed over a wide range of temperature in the isotropic phase, TGB(A), TGB(C) and SmC* phases. The Arrhenius plot of the relaxation frequency of the molecular process around the short axis shows a variation in the activation energy in the isotropic phase. This is attributed to smectic-like fluctuations in the isotropic phase. The dielectric relaxation strength in the TGBC phase has anomalous behaviour in the vicinity of TGB(C)-SmC* transition. The single cellective process observed in the TGB(C) phase splits into two processes in the SmC* phase.

    Research areas

  • LIQUID-CRYSTAL, BLUE PHASES, POINT, DERIVATIVES, TRANSITION, MODEL, TGBA

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