Pre-transitional effects in a nematic and a polymesomorphic liquid crystal

A. K. George, A. R K L Padmini

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Abstract

Measurements of ultrasonic velocity V, specific volume v and adiabatic compressibility Kad are carried out in a monotropic nematic liquid crystal, p-anisal-p-phenetidine (pApP), and a polymesomorphic liquid crystal, p-n-decyloxybenzoyl-p-cresol (DBC) with nematic and smectic A phases. Temperature variation of the order parameter is estimated. The pre-transitional effects observed in v and Kad are discussed on the basis of de Gennes' theory generalized by Bendler, and the critical exponents are estimated.

Original languageEnglish
Pages (from-to)271-274
Number of pages4
JournalUltrasonics
Volume20
Issue number6
DOIs
Publication statusPublished - 1982

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Keywords

  • liquid crystals
  • pre-transitional effects
  • ultrasonics

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Acoustics and Ultrasonics

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