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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4064
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dc.contributor.authorSasaki, Y.-
dc.contributor.authorEma, K.-
dc.contributor.authorLe, Khoa Van-
dc.contributor.authorTakezoe, Hideo-
dc.contributor.authorDhara, Surajit-
dc.contributor.authorSadashiva, B.K.-
dc.date.accessioned2011-08-08T11:03:43Z-
dc.date.available2011-08-08T11:03:43Z-
dc.date.issued2011-06-08-
dc.identifier.citationPhysical Review E, 2011, Vol.83, p061701en
dc.identifier.issn1550-2376-
dc.identifier.issn1539-3755 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/4064-
dc.descriptionOpen Accessen
dc.description.abstractWe report results of calorimetric studies for the binary mixture of rodlike host n-alkyloxy-cyanobiphenyl (nOCB, n = 8,9) and bent-shaped guest 1,3-phenylene-bis[4-(3-methylbenzoyloxy)]-4 -n-dodecylbiphenyl-4 - carboxylate (BC12). The effect of bent-shaped dopant molecules on the critical behavior associated with the nematic-smectic-Ad phase transition has been studied in detail. The transition temperature for the nematicsmectic- Ad phase sharply decreases as the increase of the mole fraction of the dopant concentration (denoted X for the BC12/9OCB mixture and Y for the BC12/8OCB mixture). The dependence of the critical exponent α on X and Y is well explained in terms of the McMillan ratio. A nearly tricritical exponent has been obtained for the X = 0.01 mixture. X = 0.02 − 0.03 mixtures, pure 8OCB, and Y = 0.01 − 0.03 mixtures exhibit nonuniversal behaviorswith effective exponents lying between the 3D-XY and tricritical exponents. The heat capacity anomaly for Y = 0.05 has been well described with the 3D-XY exponent. The critical amplitude ratio A−/A+ is close to 1 and insensitive to the dopant concentration. No Fisher renormalization of the critical exponent has been observed even for nearly tricritical compositions, which indicates the smallness of the concentration plays a decisive role rather than the steepness of the N-SmAd phase boundary.en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevE.83.061701en
dc.rights2011 American Physical Societyen
dc.subjectA Tricritical Pointen
dc.subjectNonasymptotic Critical-Behavioren
dc.subjectCritical Heat-Capacityen
dc.subjectRod-Like Moleculesen
dc.subjectCore Moleculesen
dc.subjectField-Theoryen
dc.subjectRenormalizationen
dc.subjectSmectic-A1en
dc.titleCalorimetric study of the effect of bent-shaped dopant molecules on the critical behavior at the nematic-smectic-Ad phase transitionen
dc.typeArticleen
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