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http://hdl.handle.net/2289/3039
Title: | Induced smectic mesomorphism in some binary mixtures: A new type of electrohydrodynamic pattern in the nematic phase of the mixtures |
Authors: | Moodithaya, K.P.L. Madhusudana, N.V. |
Issue Date: | 1980 |
Publisher: | Heyden |
Citation: | Proceedings of the international liquid crystals conference, Bangalore, 1979. Ed. S Chandrasekhar. Heyden, 1980, p297-302 |
Abstract: | We have studied the phase diagrams of the following binary mixtures: (a) 4,4'- (a) 4,4'- (7CB) and (b) (2-hydroxyl-p-ethoxybenzylidene-pl-butylaniline (OH-EBBA) with 7CB. Though none of the pure compounds exhibits the smectic A phase, the two mixtures exhibit an 'induced' smectic A phase over certain ranges of composition. The nematic phase occurring just above the induced smectic A phase has positive dielectric anisotropy and negative conductivity anisotropy. We have observed electrohydrodynamic instabilities in these nematics. The instability patterns, seen in homeotropically aligned samples, develops with a circular symmetry at various points in the field of view and for low frequencies of the applied field goes over to the dynamic scattering state at high enough voltages. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/3039 |
ISSN: | 0-85501-163-7 |
Copyright: | 1980 Heyden |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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1980 Proc Int Liquid Crystals Conf p297.pdf Restricted Access | Restricted Access. | 487.7 kB | Adobe PDF | View/Open Request a copy |
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