Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1897
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dc.contributor.authorWarrier, Sobha R.-
dc.contributor.authorMadhusudana, N.V.-
dc.date.accessioned2007-01-11T10:16:25Z-
dc.date.available2007-01-11T10:16:25Z-
dc.date.issued1997-
dc.identifier.citationJournal de Physique II, 1997, Vol.7, p1789-1803en
dc.identifier.issn1155-4312-
dc.identifier.issn1286-4870 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/1897-
dc.descriptionRestricted Access. Please click on the alternative location for the open-access full text.en
dc.description.abstractWe report an AC technique to measure both the sign and magnitude of (e1 + e3) using electrooptic measurements on a hybrid aligned nematic cell. A detailed numerical analysis of the optical signal allows us to obtain the temperature dependences of (e1 + e3), the rotational viscosity coefficient $\gamma_1$ as well as the anchoring strengths at the two surfaces. Our measurements on CCH-7 show the following interesting results. a) The extrapolation length L1 at the homeotropic surface shows a small decrease as the temperature is increased to 66 $^{\circ}$C beyond which it shows a sharp increase which we interpret as arising from a softening of the chains of the aligning ODSE layer. b) The slope of the temperature dependence of the extrapolation length $L_{\rm u}$. at the homogeneous surface changes sign around 72 $^{\circ}$C. c) (e1 + e3)/S is a constant upto 72 $^{\circ}$C and decreases rapidly beyond this temperature. The last two results are attributed to an increase in the conformational freedom between the rings of CCH-7 molecules beyond that temperature.en
dc.format.extent845512 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.urihttp://dx.doi.org/10.1051/jp2:1997215en
dc.rights(1997) Les Editions de Physiqueen
dc.titleAn AC Electrooptic Technique for Measuring the Flexoelectric Coefficient $\mathsf(e_1 + e_3)$ and Anchoring Energies of Nematicsen
dc.typeArticleen
Appears in Collections:Research Papers (SCM)

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