Publication Title

Physical Review Letters

Publication Date

2-25-1991

Document Type

Article

DOI

10.1103/PhysRevLett.66.1062

Keywords

Smectic A Transition, Critical Heat Capacity, Tricritical Point, Octylcyanobiphenyl 8Cb, Octyloxycyanobiphenyl, Behavior

Disciplines

Physics

Abstract

The results of specific-heat measurements at the nematic- (N) to-neat-soap (NS) and nematic-to-isotropic (I) phase transitions in binary mixtures of cesium-perfluoro-octanoate and water are reported. The ratio of specific-heat amplitudes above and below the N-NS transition, A+/A-, and the specific-heat exponent α remain ∼1.0 and ≤0.02, respectively, suggesting 3D XY-type behavior. At the first-order N-I transition, vanishing latent heat and coexistence range at low concentration indicate the existence of a Landau point.

Comments

Copyright 1991 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.66.1062.


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