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 language | English |
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Pages (from-to) | 271-274 |
Number of pages | 4 |
Journal | Ultrasonics |
Volume | 20 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1982 |
Keywords
- liquid crystals
- pre-transitional effects
- ultrasonics
ASJC Scopus subject areas
- Safety, Risk, Reliability and Quality
- Acoustics and Ultrasonics