X-Ray Studies of Tilted Hexatic Phases in Thin Liquid-Crystal Films
- 4 November 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 55 (19), 2039-2042
- https://doi.org/10.1103/physrevlett.55.2039
Abstract
X-ray-diffraction studies of the structures and phase transitions of the tilted hexatic phases (smectic and smectic in thin liquid-crystal films of 4--heptyloxybenzylidene-4-n--heptylaniline (70.7) are reported. The measured correlation lengths were strongly anisotropic in both phases. The smectic- to smectic- transition is first order as expected from the symmetry change. The smectic- to smectic- transition is first order with strong pretransition effects and becomes nearly second order as the film thickness is decreased.
Keywords
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