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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. |
URI: | http://hdl.handle.net/2289/2326 |
ISSN: | 1058-725X |
Alternative Location: | http://dx.doi.org/10.1080/10587259408046931 |
Copyright: | 1994 OPA (Overseas Publishers Association) N.V. |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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1994 MCLC V238 p241.pdf Restricted Access | Restricted Access | 249.51 kB | Adobe PDF | View/Open Request a copy |
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