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

A. K. George; A. R K L Padmini

doi:10.1016/0041-624X(82)90048-8

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

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

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Measurements of ultrasonic velocity V, specific volume v and adiabatic compressibility K_ad 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 K_ad are discussed on the basis of de Gennes' theory generalized by Bendler, and the critical exponents are estimated.

Original language	English
Pages (from-to)	271-274
Number of pages	4
Journal	Ultrasonics
Volume	20
Issue number	6
DOIs	https://doi.org/10.1016/0041-624X(82)90048-8
Publication status	Published - 1982

Keywords

liquid crystals
pre-transitional effects
ultrasonics

ASJC Scopus subject areas

Safety, Risk, Reliability and Quality
Acoustics and Ultrasonics

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10.1016/0041-624X(82)90048-8

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AB - 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.

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