| Quasicritical behavior of dielectric permittivity in the isotropic phase of n-hexyl-cyanobiphenyl in a large range of temperatures and pressures. | |
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MedLine Citation:
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PMID: 11969535 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Results of studies of the dielectric permittivity and nonlinear dielectric effect (NDE) in the isotropic phase of n-hexyl-cyanobiphenyl are presented. The data reported cover both pressure and temperature dependence. Measurements under atmospheric pressure were carried out in a wide range, up to 100 K from the clearing temperature. The application of a weak measurement frequency (f=67 kHz) resulted in a negligible influence of relaxation processes on NDE results. For both temperature and pressure paths, the dielectric permittivity and the NDE exhibited strong pretransitional effects, described by "critical" exponents phi =1-alpha approximately 0.5 and gamma=1, respectively. Scaling expressions for the pretransitional behavior of the NDE and of the dielectric permittivity have been proposed. The relationship between pretransitional effects in the isotropic phase of nematogens and in critical solutions has also been discussed. |
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Authors:
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A Drozd-Rzoska |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Volume: 59 ISSN: 1063-651X ISO Abbreviation: Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics Publication Date: 1999 May |
Date Detail:
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Created Date: 2002-04-23 Completed Date: 2002-08-27 Revised Date: 2003-11-03 |
Medline Journal Info:
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Nlm Unique ID: 9887340 Medline TA: Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics Country: United States |
Other Details:
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Languages: eng Pagination: 5556-61 Citation Subset: - |
Affiliation:
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Institute of Physics, Silesian University, ulica Uniwersytecka 4, 40-007 Katowice, Poland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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