Nematic-Smectic-A Tricritical Point in Alkylcyanobiphenyl Liquid Crystals

J. Thoen, H. Marynissen, and W. Van Dael
Phys. Rev. Lett. 52, 204 – Published 16 January 1984
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Abstract

From adiabatic-scanning calorimetric results it is demonstrated that in mixtures of 9CB and 10CB, two compounds of the alkylcyanobiphenyl (nCB) series, the nematic (N) to smectic-A (A) transition becomes first order for narrow N ranges. From the latent heats a tricritical point is located in the phase diagram. Measurements for 7CB+ 8CB mixtures show that the specific-heat exponent α depends on the width of the N range for continuous AN transitions.

  • Received 21 October 1983

DOI:https://doi.org/10.1103/PhysRevLett.52.204

©1984 American Physical Society

Authors & Affiliations

J. Thoen, H. Marynissen, and W. Van Dael

  • Laboratorium voor Molekuulfysika, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3030 Leuven, Belgium

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Vol. 52, Iss. 3 — 16 January 1984

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