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  2. Ac-Calorimetry Studies at the Hexatic-B Smectic-A and Crystal-B Hexatic-B Phase-Transitions in 2 Compounds With Hydrogen-Bonding
Author(s)
Abstract

Two compounds of the 1-(4’-alkoxyphenylamino-3-[5’’-(2’’-menthylpirydil)]-propen-1-one-3 (PIRn) series that exhibit the hexatic-B (Hex-B) to smectic-A (Sm-A) and the crystal-B (Cry-B) to Hex-B phase transitions were studied by high resolution ac calorimetry. The Hex-B–Sm-A phase transition was found to be of first order and continuous for PIR7 and PIR9, respectively. The tricritical point was located at the concentration for which TCry-B–Hex-B/THex-B–Sm-A =0.980±0.004, i.e., a hexatic range of 7 K. At both sides of the tricritical point, nonclassical and non-three-dimensional-XY specific heat exponents α were observed. The Cry-B–Hex-B phase transition was of first order and was associated with a small or immeasurable Cp anomaly.
Format
Article
Identifier(s)
10.1103/PhysRevE.51.3346
Publication Date
1995-04-15
Publication Title
Physical Review E
Volume
51
Issue
4
First Page
3346
Last Page
3349
Keywords
Subject
Rights
http://rightsstatements.org/vocab/InC/1.0/
Community
Department of Physics
Comments

Copyright 1995 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.51.3346.
Permalink https://oaks.kent.edu/phypubs/15
Iannacchione, G., Gorecka, E., Kumar, S., & Finotello, D. (1995). Ac-Calorimetry Studies at the Hexatic-B Smectic-A and Crystal-B Hexatic-B Phase-Transitions in 2 Compounds With Hydrogen-Bonding (1–). Physical Review E. https://doi.org/10.1103/PhysRevE.51.3346
Iannacchione, Germano, Ewa Gorecka, Satyendra Kumar, and Daniele Finotello. 1995. “Ac-Calorimetry Studies at the Hexatic-B Smectic-A and Crystal-B Hexatic-B Phase-Transitions in 2 Compounds With Hydrogen-Bonding”. Physical Review E. https://doi.org/10.1103/PhysRevE.51.3346.
Iannacchione, Germano, et al. Ac-Calorimetry Studies at the Hexatic-B Smectic-A and Crystal-B Hexatic-B Phase-Transitions in 2 Compounds With Hydrogen-Bonding. Physical Review E, 15 Apr. 1995, https://doi.org/10.1103/PhysRevE.51.3346.