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A novel magnetohydrodynamic experiment: Step-rotation of a nematic subject to a magnetic field

Record type: Article

We have studied the time-dependent behavior of the director following the step-rotation of a nematic sample subject to a static magnetic field. The director orientation has been monitored using ESR spectroscopy, and we have developed a model-independent analysis of the spectra to yield the distribution function for the director with respect to the magnetic field. This reveals that immediately following the step-rotation the director is uniformly aligned parallel to the field and then adopts a range of orientations before returning to a state of uniform alignment with the director at the step-rotation angle to the field. This unusual behavior of the director is compared with the predictions of nematodynamic theory by employing an exact treatment of the Leslie-Ericksen equations to calculate the time and space dependence of the director orientation.

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Citation

Dunn, C. J., Ionescu, D., Kunimatsu, N., Luckhurst, G. R., Orian, L. and Polimeno, A. (2000) A novel magnetohydrodynamic experiment: Step-rotation of a nematic subject to a magnetic field Journal of Physical Chemistry B, 104, (47), pp. 10989-11000. (doi:10.1021/jp002073a).

More information

Published date: 30 November 2000
Keywords: transient periodic structures, liquid-crystals, reorientation, transition, dynamics, director

Identifiers

Local EPrints ID: 18944
URI: http://eprints.soton.ac.uk/id/eprint/18944
ISSN: 1089-5647
PURE UUID: caf527ea-4fe7-4a4c-9986-07512e7e7acf

Catalogue record

Date deposited: 05 Jan 2006
Last modified: 17 Jul 2017 16:34

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Contributors

Author: C. J. Dunn
Author: D. Ionescu
Author: N. Kunimatsu
Author: G. R. Luckhurst
Author: L. Orian
Author: A. Polimeno

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