Unusual melting behavior in a smectic liquid crystal

I. D. Calder*, Bimal K. Sarma, B. Y. Cheng, J. B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Sound-velocity and attenuation measurements are reported for the smectic liquid crystal p-butoxybenzylidene-p′-octylaniline. At the smectic-A smectic-B transition temperature TAB, v and α change rapidly, with a peak in α occurring below TAB. A very small anomaly is also visible 2 to 2.5 degrees above TAB. The data at TAB are analyzed in terms of dislocation-mediated melting theories by assuming that the transition occurs at a crossover between two- and three-dimensional behavior. The low-frequency velocity change of Δvv=0.047 within the planes agrees well with the predicted value of 0.040.

Original languageEnglish (US)
Pages (from-to)2133-2137
Number of pages5
JournalPhysical Review A
Issue number5
StatePublished - 1980

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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