A Phase Diagram of the Nematic, Smectic A and Smectic C phases in Liquid Crystals

Date

1998-12-01

Author

Salihoǧlu, S.
Yurtseven, Hasan Hamit

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In this study we have obtained a phase diagram for the nematic, smectic A and smectic C phases in liquid crystals. For this phase diagram we have studied two different mean field models for a mixture of liquid crystalline system. In our first model we consider the NC and AC transitions as first order, and the NA transition as a second order. In our second model we consider the NC and NA transitions as first order, and the AC transition as a second order.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0347130012&origin=inward
https://hdl.handle.net/11511/79699

Journal

Turkish Journal of Physics

Collections

Department of Physics, Article

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A mean-field model for the phase diagram of liquid crystals Tublek, A; Yurtseven, Hasan Hamit; Salihoglu, S (Informa UK Limited, 1998-01-01) In this study we have developed a mean-field model to obtain the phase diagram for a mixture of liquid crystals. Our mean-field model gives the phase diagram of the nematic, smectic A and smectic C phases near the NAC point. We have fitted our model to the experimentally observed data. From this fitting, we conclude that our mean-field model explains correctly the experimentally observed behavior of a mixed liquid crystalline system near the NAC point.
A phase diagram near the NAC* point in liquid crystals Salihoglu, S; Tublek, A; Yurtseven, Hasan Hamit (Informa UK Limited, 2000-01-01) Wt study here a mean field model to obtain the phase diagram (concentration versus temperature) near the NAC* point in a binary mixture of liquid crystal. Wr have Fitted our phase line equations to the experimental data for the mixture of SCE9 + SCE10 liquid crystals. We deduce fi om our analysis that there should exist a tricritical point close to the NAC* point on the AC* phase line.
A phase diagram for the ice VI-VII-VIII transitions Yurtseven, Hasan Hamit (1998-04-01) In this study we obtain the P-T phase diagram for the ice VI-VII-VIII phase transitions by means of the mean held model developed here. We have fitted the experimentally measured P-T data to our phase Line equations. Our calculated phase diagram describes adequately the observed behavior of the ice VI-VII-VIII phase transitions.
A temperature-concentration (T-X) phase diagram calculated using the mean field theory for liquid crystals Yurtseven, Hasan Hamit; KARACALİ, HUSEYİN (Springer Science and Business Media LLC, 2013-06-01) Phase-line equations for smectic-hexatic phase transitions in liquid crystals were derived using the Landau phenomenological theory. In particular, second-order transitions for the smectic-A-smectic-C (SmA-SmC) and hexatic-B-hexatic-F (or HexI) transitions were studied and the tricritical points for these transitions were located. The calculated phase-line equations were fitted (using experimental data for various liquid crystals) to construct a generalized T-X phase diagram. It was shown that the T-X phase...
Calculation of the T-X phase diagram for a mixture of liquid crystals Yurtseven, Hasan Hamit; Salihoglu, S (2000-12-01) In this study we calculate the T-X phase diagram for a mixture of liquid crystals. In this calculation we use a mean field theory We fit our calculated phase line equations to the experimental data from the literature. There is a very good agreement between our calculated and the experimentally observed phase diagram.

Citation Formats

S. Salihoǧlu and H. H. Yurtseven, “A Phase Diagram of the Nematic, Smectic A and Smectic C phases in Liquid Crystals,” Turkish Journal of Physics, pp. 1087–1096, 1998, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0347130012&origin=inward.