Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6887
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dc.contributor.authorChausov, D N-
dc.contributor.authorKurilova, A D-
dc.contributor.authorBelyaev, V.V.-
dc.contributor.authorKumar, Sandeep-
dc.date.accessioned2018-05-08T19:43:49Z-
dc.date.available2018-05-08T19:43:49Z-
dc.date.issued2018-03-02-
dc.identifier.citationOpto-Electronics Review, 2018, Vol.26, p44-49en_US
dc.identifier.issn1230-3402-
dc.identifier.urihttp://hdl.handle.net/2289/6887-
dc.descriptionRestricted Access.en_US
dc.description.abstractDielectric properties of a nematic liquid crystal (NLC) mixture ZhK-1282 were investigated in the frequency range of 102–106Hz and a temperature range of −20 to 80 °С. On the basis of the Debye’s relaxation polarization model dielectric spectra of temperature dependence of the orientational relaxation time τ and the dielectric strength δe were numerically approximated at the parallel orientation of a molecular director relative to alternating electric field. Influence of ester components in the mixture plays crucial role in relaxation processes at low temperature and external field frequency. The activation energy of the relaxation process of a rotation of molecules around their short axis was measured in a temperature interval of −20 to  +15 °С in which the dispersion of a longitudinal component of the dielectric constant takes place. The energy of potential barrier for polar molecules rotation in the mesophase was calculated. The value of the transition entropy from the nematic to isotropic phase was obtained from this calculation. The values of the coefficient of molecular friction and rotational diffusion were obtained by different methods. The experimental data obtained are in a satisfactory agreement with the existing theoretical models.en_US
dc.language.isoenen_US
dc.publisherElsevier B. V.en_US
dc.relation.urihttp://arxiv.org/abs/cond-mat/en_US
dc.relation.urihttps://doi.org/10.1016/j.opelre.2017.12.001en_US
dc.rights2018 Elsevier Inc.en_US
dc.subjectDielectric relaxationen_US
dc.subjectDielectric spectroscopyen_US
dc.subjectCrossover frequencyen_US
dc.subjectMolecular frictionen_US
dc.subjectRotational diffusionen_US
dc.subjectLiquid crystalsen_US
dc.titleParameters of LC molecules’ movement measured by dielectric spectroscopy in wide temperature rangeen_US
dc.typeArticleen_US
Appears in Collections:Research Papers (SCM)

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