Characterization of the smectic-A-hexatic-B transition in 65OBC by adiabatic scanning calorimetry

Autor:	Katleen Denolf, Jan Thoen, B. Van Roie, Guido Pitsi
Rok vydání:	2005
Předmět:	Phase transition Materials science Condensed matter physics Biophysics Thermodynamics Surfaces and Interfaces General Chemistry Calorimetry Heat capacity Differential scanning calorimetry Latent heat General Materials Science Adiabatic process Hexatic phase Critical exponent Biotechnology
Zdroj:	The European Physical Journal E. 16:361-364
ISSN:	1292-895X 1292-8941
DOI:	10.1140/epje/i2004-10091-3
Popis:	We investigated the smectic-A-hexatic-B (SmA-HexB) transition in the liquid-crystal n-hexyl-4’-n-pentyloxybiphenyl-4-carboxilate (65OBC) with adiabatic scanning calorimetry. We were able to prove in a direct way that this transition is indeed very weakly first order, as was already suggested in the literature. The latent heat at the transition was determined to be ΔHL = 0.04±0.02 J/g. Our experiments confirm the high value for the heat capacity critical exponent earlier reported, yielding α = 0.64±0.05.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fe4e803665ae029861f32fe8f0093ba3 https://doi.org/10.1140/epje/i2004-10091-3 Zobrazit plný text záznamu Plný text ve formátu PDF