Experimental investigations of a new TGB C mesophase

A. Ribeiro, Ph. Barois, Y. Galerne, L. Oswald and D. Guillon ()

The European Physical Journal B: Condensed Matter and Complex Systems, 1999, vol. 11, issue 1, 121-126

Abstract: We report on optical and structural X-ray studies on a smectic C twist grain boundary phase (TGB C ) of a pure liquid crystalline material. It is shown that this TGB C phase, which exists over a large range of temperature, is definitely different from previously reported and predicted TGB C phases. The two main experimental features are: (i) the observation in planar geometry of an optical texture exhibiting a square grid pattern, and (ii) the detection of a broad Bragg ring in reciprocal space instead of one (TGB A ) or two (TGB C ) sharp rings. We suggest a few possible tracks that can be explored to understand the complex structure of this new phase. Copyright Società Italiana di Fisica, Springer-Verlag 1999

Keywords: PACS. 61.30.-v Liquid crystals; 61.30.Eb Experimental determinations of smectic; nematic; cholesteric; and other structures; 61.30.Jf Defects in liquid crystals (search for similar items in EconPapers)
Date: 1999
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DOI: 10.1007/BF03219161

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