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Surface transitions, critical adsorption, and spontaneous polarization inversion in freely suspended liquid-crystal films

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Bahr,  Christian
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Bahr, C. (1997). Surface transitions, critical adsorption, and spontaneous polarization inversion in freely suspended liquid-crystal films. Molecular Crystals and Liquid Crystals Science and Technology Section A-Molecular Crystals and Liquid Crystals, 301(1), 313-324. doi:10.1080/10587259708041783.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-B9B5-3
Abstract
A summary is given of recent results of ellipsometric measurements on freely suspended films, between two and several hundred molecular layers thick, of 2-methylbutyl 4-alkanoyl-oxybiphenyl-4′-carboxylate liquid-crystal compounds showing smectic-A and ferroelectric smectic-C phases. The results concern in particular: the sign inversion of the spontaneous polarization in thin films, the thickness divergence of the surface-induced smectic-C order on approaching the bulk smectic-A - smectic-C transition in very thick films, and the behavior of the smectic-A - smectic-C surface transition in thin and thick films. Special attention is paid to new observations the origins of which are still to clarify.