Stability of the uniform alignment of lyotropic nematic liquid crystals doped with magnetic grains

Authors
Barbero, G Neto, AMF Madhusudana, NV
Citation
G. Barbero et al., Stability of the uniform alignment of lyotropic nematic liquid crystals doped with magnetic grains, PHYS LETT A, 251(6), 1999, pp. 373-377
Citations number
12
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
251
Issue
6
Year of publication
1999
Pages
373 - 377
Database
ISI
SICI code
0375-9601(19990208)251:6<373:SOTUAO>2.0.ZU;2-5
Abstract
The stability of the uniform alignment of lyotropic nematic liquid crystals doped with magnetic grains is theoretically analysed. The sample is assume d to be prepared in a uniformly magnetized state by means of an external ma gnetic field, which is switched off subsequently. We show that there is a c ritical concentration of magnetic grains above which the distorting effect of the magnetic interaction overcomes the stabilizing effect of the steric interactions among grains and micelles. (C) 1999 Elsevier Science B.V.