Simple method for confirming the antiferroelectric structure of smectic liquid crystals
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 2 (1) , 71-73
- https://doi.org/10.1039/jm9920200071
Abstract
Schlieren texture has been observed in Sc and S CA liquid-crystalline phases. We found that defects of strength s=± 1/2 exist in the S CA phase in addition to those of s=± 1 observed in the Sc phase. The existence of the s=± 1/2 wedge disclination is explained by taking account of a screw dislocation. This complex defect consisting of a wedge disclination and a screw dislocation, i. e. a dispiration, serves as a simple test to confirm the antiferroelectric (S CA ) structure.Keywords
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