A novel magnetohydrodynamic experiment: Step-rotation of a nematic subject to a magnetic field
A novel magnetohydrodynamic experiment: Step-rotation of a nematic subject to a magnetic field
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.
transient periodic structures, liquid-crystals, reorientation, transition, dynamics, director
10989-11000
Dunn, C. J.
5ff2180f-9d08-4ca7-b196-b9fb82300ee5
Ionescu, D.
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Kunimatsu, N.
fc783997-29c6-4aca-8974-61ed6398606f
Luckhurst, G. R.
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Orian, L.
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Polimeno, A.
6000521f-00b1-4903-93b3-1ebe3bb86aaa
30 November 2000
Dunn, C. J.
5ff2180f-9d08-4ca7-b196-b9fb82300ee5
Ionescu, D.
b3963c3f-976f-4754-be7a-8600489a194e
Kunimatsu, N.
fc783997-29c6-4aca-8974-61ed6398606f
Luckhurst, G. R.
923cc3f5-cc34-4c4c-8508-1fe3b83aac16
Orian, L.
2d66d544-ea42-4ae4-8f5a-f6c3b94f19b6
Polimeno, A.
6000521f-00b1-4903-93b3-1ebe3bb86aaa
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.
The Journal of Physical Chemistry B, 104 (47), .
(doi:10.1021/jp002073a).
Abstract
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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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: 1520-5207
PURE UUID: caf527ea-4fe7-4a4c-9986-07512e7e7acf
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Date deposited: 05 Jan 2006
Last modified: 15 Mar 2024 06:09
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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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