Influence of Pressure on Smectic A-Nematic Phase Transition
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In this article, a Landau-de-Gennes phenomenological model is proposed to describe the pressure induced smectic A-nematic phase transition, and the influence of pressure on the phase transition is discussed for varying coupling between orientational and translational order parameter with pressure.Abstract:
We propose a Landau-de Gennes phenomenological model to describe the pressure induced smectic A-nematic phase transition. The influence of pressure on smectic A-nematic phase transitions are discussed for varying coupling between orientational and translational order parameter with pressure. Increasing the pressure, the first order nematic-smectic A transition becomes second order at a tricritical point which agrees fairly well with available experimental results.read more
Citations
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Binary mixtures of nCB and nOCB liquid crystals. Two experimental evidences for a smectic A nematic tricritical point
TL;DR: In this article, a tricritical point (TCP) composition at the second order SmA to N transition has been found for the binary mixtures of 8OCB and 9OCB.
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Effect of nonmesogenic solute on the nematic-smectic-A phase transition
TL;DR: In this paper, the effect of nonmesogenic solute on the nematic-smectic-A (NA) transition is examined within the Landau phenomenological theory, and the effects of non mesogenic solutes on the Frank elastic constants are also discussed.
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Evidence of pressure dependence tricritical point at the nematic–smectic-A transition
TL;DR: In this article, the authors examined the effect of pressure on the nematic to smectic-A N-SmA transition within the Landau phenomenological theory and found that the theoretical predictions were in good qualitative agreement with experimental results.
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Thermodynamic assessment of smectic A-nematic tricritical points through the equal gibbs energy analysis.
TL;DR: The Oonk's method is extended in order to account for second-order phase transitions and allows performing calculations of the tricritical temperature.
References
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Measurement of Smectic-A-Phase Order-Parameter Fluctuations near a Second-Order Smectic-A-Nematic-Phase Transition
TL;DR: In this article, the anisotropic liquid-structure factor of C-cyanobenzylidene-amino and octyloxybenzene was measured in the nematic phase using x rays.
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Critical behavior near the nematic-smectic-A transition in butyloxybenzylidene octylaniline (40.8)
TL;DR: In this article, a high-resolution heat-capacity and x-ray study of the nematic-smectic-$A$ transition in the single-layer smectic material butyloxybenzylidene octylaniline (40.8) was performed.
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Renormalization-group treatment of the dislocation loop model of the smectic- A —nematic transition
TL;DR: A dislocation model for the smectic-$A$---nematic transition is mapped onto a peculiar sort of anistropic superconductor, which is then studied using a momentumshell renormalization group as mentioned in this paper.
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Nematic-smectic transitions in mixtures - a liquid crystal tricritical point
TL;DR: In this article, it was shown that a tricritical point analogous to that in He 3 -He 4 mixtures should occur in mixtures of liquid crystals with first and second order nematic-smectic transitions.