Effect of free surfaces on the smectic-A-hexatic-B-crystal-E transitions in thin free-standing films of the liquid-crystal compound n-heptyl-4-n- pentyloxybiphenyl-4-carboxylate (75OBC)

R. Geer, T. Stoebe, C. C. Huang

Research output: Contribution to journalArticle

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Abstract

An ac free-standing film calorimeter has been recently developed to investigate the physical properties of the smectic-A-hexatic-B-crystal-E transitions in free-standing films of the liquid-crystal compound n-heptyl-4-n-pentyloxybiphenyl-4-carboxylate (75OBC). Due to the surface-enhanced order on free surfaces, we have discovered many new physical phenomena, e.g., a rich phase diagram, layer-by-layer transitions near a continuous transition, an interplay between a strong first-order surface transition and a nearby continuous transition, etc.

Original languageEnglish (US)
Pages (from-to)408-427
Number of pages20
JournalPhysical Review E
Volume48
Issue number1
DOIs
StatePublished - Jan 1 1993

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