Studies on binary mixtures of systems which exhibit a maximum as well as a minimum in the A-N transition boundary

Srikanta, B.S.; Madhusudana, N.V.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2499

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DC Field	Value	Language
dc.contributor.author	Srikanta, B.S.	-
dc.contributor.author	Madhusudana, N.V.	-
dc.date.accessioned	2007-05-28T05:38:10Z	-
dc.date.available	2007-05-28T05:38:10Z	-
dc.date.issued	1983-10	-
dc.identifier.citation	Molecular Crystals and Liquid Crystals, 1983, Vol.99, p203-221	en
dc.identifier.issn	1058-725X	-
dc.identifier.uri	http://hdl.handle.net/2289/2499	-
dc.description	Restricted Access. Paper presented at the 9th international conference on liquid crystals held at Bangalore in 1982.	en
dc.description.abstract	We have studied the binary phase diagrams of (I) p'-nitrophenyl-p-n-octyloxybenzoate with (2-hydroxy)-p-ethoxybenzylidene-p'-butylaniline, and (II) p'-n-octyloxy-p-cyanobiphenyl with p-butoxyphenyl-(p'-pentyloxy)benzoate. Both of them show a strong maximum in the A-N boundary, indicative of an induced A phase, and further, a well defined minimum for a composition rich in the highly polar component. The interactions responsible for the induced phase are much stronger for the system II than for the system I. We have investigated the temperature variations of the layer spacings for various compositions of both the systems. In system I, there is a considerable thermal expansion of the spacing, the expansion coefficient attaining a maximum value for the composition corresponding to the minimum in the A-N boundary. We have given a physical interpretation of this observation. The dielectric anisotropies of various compositions of system I have also been investigated and their temperature dependences interpreted in terms of the physical model mentioned above. The conductivity anisotropy changes sign for all compositions exhibiting the A phase. The temperature of crossover in relation to TAN is the highest for the mixture which exhibits the minimum value of TAN, since the A-N transition is almost of a second order character for this composition.	en
dc.format.extent	489086 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Gordon and Breach Science Publishers.	en
dc.relation.uri	http://arxiv.org/abs/cond-mat/	en
dc.relation.uri	http://dx.doi.org	en
dc.rights	1983 OPA (Overseas Publishers Association) N.V.	en
dc.title	Studies on binary mixtures of systems which exhibit a maximum as well as a minimum in the A-N transition boundary	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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