Physical Review Letters
Smectic A Transition, Critical Heat Capacity, Tricritical Point, Octylcyanobiphenyl 8Cb, Octyloxycyanobiphenyl, Behavior
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.
Shin, T. S. and Kumar, Satyendra (1991). Microcalorimetric Study of Nematic-to-Neat-Soap and Nematic-to-Isotropic Phase Transitions in a Lyotropic Liquid Crystal. Physical Review Letters 66(8), 1062-1065. doi: 10.1103/PhysRevLett.66.1062 Retrieved from https://digitalcommons.kent.edu/phypubs/81