Journal ArticleDOI
Pretransitional Phenomena in the Isotropic Phase of a Nematic Liquid Crystal
T. W. Stinson,J. D. Litster +1 more
TLDR
In this article, the authors have observed a divergence of the magnetic birefringence, and a critical increase and slowing of the fluctuations in order in the isotropic phase of a nematic liquid crystal.Abstract:
We have observed a divergence of the magnetic birefringence, and a critical increase and slowing of the fluctuations in order in the isotropic phase of a nematic liquid crystal. Our results are quantitatively described by a mean-field model except for a critical region close to the ordering temperature where the fluctuations are so large that the meanfield approximation fails.read more
Citations
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Journal ArticleDOI
Collective and single-particle dynamics near the isotropic—nematic phase transition
TL;DR: In this article, the authors studied the single-particle and collective orientational dynamics of a liquid crystal near the isotropic-nematic phase transition by performing time-resolved spectroscopy experiments.
Journal ArticleDOI
Optical Kerr effect in the isotropic phase of various alkyl-cyanobiphenyl homologues
P.V. Kolinsky,B.R. Jennings +1 more
TL;DR: In this article, measurements have been made of the optical Kerr effect on four homologous members of the alkyl-cyanobiphenyl series of liquid crystals at temperatures above the nematic-to-isotropic clearing temperatures.
Journal ArticleDOI
On the interpretation of ultrasonic relaxaton phenomena in nematics
TL;DR: In this article, a slow intramolecular relaxation process in MBBA is proposed to originate in the flexibility of the hydrocarbon chain, and the importabnce o fits contribution to the ultrasonic attenuation near the nematic-isotropic phase transition is stressed.
Journal ArticleDOI
Magneto-optical effect in a system of colloidal particle having anisotropic dielectric property
TL;DR: In this article, it was shown that the optical effects only come up when a magnetic field is applied because all the dielectric ellipsoids become aligned, and the mechanism of optical effects is different from general ferrofluids and liquid crystals, and can be viewed as an optically anisotropic action which results from the coupling of both the magnetic and dielectrics properties.
Journal ArticleDOI
Pretransitional behaviour in the vicinity of the isotropic nematic transition of strongly polar compounds
TL;DR: Dielectric measurements carried in the vicinity of the isotropic-nematic transition for a number of compounds having different molecular structures including a bent core system, but with a common feature that the molecules possess a strong terminal polar group, nitro in one case and cyano in the rest are reported.