Heat-Capacity Study of the Transition from a Stacked-Hexatic-B Phase to a Smectic-A Phase

C. C. Huang, J. M. Viner, R. Pindak, J. W. Goodby

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Abstract

High-resolution ac calorimetry measurements have been performed on a liquid-crystal material exhibiting a stacked-hexatic-Bsmectic-A phase transition. The transition appears to be second order with a pronounced, symmetric heat capacity peak and no observable thermal hysteresis. The data can be fitted by a power law divergence with critical exponents ==0.640.04 and a ratio of critical amplitudes AA=0.83. Measurements have also been carried out on a crystalline-B-smectic-A transition which is found to be first order.

Original languageEnglish (US)
Pages (from-to)1289-1292
Number of pages4
JournalPhysical Review Letters
Volume46
Issue number19
DOIs
StatePublished - Jan 1 1981

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