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Title: An experimental study of the smectic A-smectic C transitions in monolayer, partially bilayer and bilayer systems
Authors: Krishna Prasad, S.
Shankar Rao, D.S.
Raja, V.N.
Chandrasekhar, S.
Heppke, G.
Neubert, M.E.
Keywords: smectic A-smectic C transition
tilt angle measurements
mean-field model
Issue Date: Jan-1994
Publisher: Gordon and Breach Science Publishers.
Citation: Molecular Crystals and Liquid Crystals, 1994, Vol.238 , p241-247
Abstract: The smectic A-smectic C (A-C) transition in several compounds has been shown to be mean-field-like (MF) with a substantial tricritical crossover effect. However, a simple MF behaviour, i.e., with negligible tricritical influence, had not been reported till recently. The heat capacity measurements of the MIT group in two compounds exhibiting the bilayer A2-C2 transition revealed such a behaviour. It is of interest to investigate whether a simple MF behaviour can be observed for partially bilayer Ad-Cd and monolayer A1-C1 transitions also. We report the first systematic order parameter measurements in the vicinity of the A2-C2, Ad-Cd and A1-C1 transitions. The data analysed in terms of power law and extended mean field expressions provide clear evidence of a simple MF behaviour in all three cases. The significance of this result is discussed.
Description: Restricted Access.
ISSN: 1058-725X
Alternative Location:
Copyright: 1994 OPA (Overseas Publishers Association) N.V.
Appears in Collections:Research Papers (SCM)

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