AC-calorimetry Studies at the Hexatic-B–smectic-A and Crystal-B–hexatic-B Phase Transitions in Two Compounds with Hydrogen Bonding

Department of Physics
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  2. AC-calorimetry Studies at the Hexatic-B–smectic-A and Crystal-B–hexatic-B Phase Transitions in Two 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
1995-04-01
Publication Title
Physical Review E
Volume
51
Issue
4
First Page
3346
Last Page
3349
Subject
Rights
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Community
Department of Physics
Permalink https://oaks.kent.edu/article/ac-calorimetry-studies-hexatic-b-smectic-and-crystal-b-hexatic-b-phase-transitions-two
Iannacchione, G., Gorecka, E., Pyzuk, W., Kumar, S., & Finotello, D. (1995). AC-calorimetry Studies at the Hexatic-B–smectic-A and Crystal-B–hexatic-B Phase Transitions in Two Compounds with Hydrogen Bonding (1–). Physical Review E. https://doi.org/10.1103/PhysRevE.51.3346
Iannacchione, Germano, Ewa Gorecka, Wieslaw Pyzuk, Satyendra Kumar, and Daniele Finotello. 1995. “AC-Calorimetry Studies at the Hexatic-B–smectic-A and Crystal-B–hexatic-B Phase Transitions in Two 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 Two Compounds With Hydrogen Bonding. Physical Review E, 1 Apr. 1995, https://doi.org/10.1103/PhysRevE.51.3346.