Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2889
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dc.contributor.authorKini, U.D.-
dc.date.accessioned2007-06-15T07:14:28Z-
dc.date.available2007-06-15T07:14:28Z-
dc.date.issued1994-07-
dc.identifier.citationLiquid Crystals, 1994, Vol.17, p65 - 93en
dc.identifier.issn0267-8292-
dc.identifier.issn1366-5855 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/2889-
dc.descriptionRestricted Access.en
dc.description.abstractPrevious theoretical studies are extended to consider bistability of director orientations induced by changing the tilt of a magnetic field applied to a nematic sample. The ground state configuration which is assumed to be twisted, with the director tilted at the sample planes, can be one of two kinds - S1 and S2. The rigid anchoring hypothesis is employed throughout. When the field is sufficiently strong there occur two independent branches over which the distortion varies as the magnetic tilt is changed and these branches generally overlap over the bistable region. When the ground state twist is high enough, the bistable region can disappear altogether leaving a gap of no overlap between the two branches. Linear stability analysis shows that the static orientation tends to become unstable against linear perturbations when the magnetic tilt crosses the edges of the gap. It is possible that the distortion changes irreversibly from the S1 type (or S2 type) to one of S2 type (or S1 type) causing a considerable lowering of the overall twist. Results for positive diamagnetic anisotropy materials (b.chiA > 0) are compared with those for negative b.chiA materials. When the ground state is of the S2 type, a sufficiently strong field applied along certain directions can produce a transition at a threshold above which the distortion becomes asymmetric relative to the sample centre. The case of chiral nematics and that of weak anchoring are briefly reviewed.en
dc.format.extent2103159 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherTaylor & Francisen
dc.relation.urihttp://dx.doi.org/10.1080/02678299408036550en
dc.rights1994 Taylor & Francisen
dc.titleMagnetic field induced bistability in distorted nematic ground statesen
dc.typeArticleen
Appears in Collections:Research Papers (SCM)

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