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Article
Periodic Stripe Domains and Hybrid-Alignment Regime in Nematic Liquid-Crystals - Threshold Analysis
Physical Review E
  • A. Sparavigna
  • Oleg Lavrentovich, Kent State University - Kent Campus
  • A. Strigazzi
Publication Date
2-1-1994
Document Type
Article
DOI
10.1103/PhysRevE.49.1344
Keywords
  • splay-stripes,
  • Freedericksz transition,
  • aligned Nematics,
  • magnetic-field,
  • layer,
  • K24
Disciplines
Abstract
Recently we investigated the occurrence of static periodic stripes in a hybrid aligned nematic cell. Assuming that the tilt anchoring was stronger at the planar wall than at the homeotropic wall, we have found the critical thickness of the cell for the transition from planar to periodic alignment as a function of the surface energy in the presence of a magnetic field. Here we study, for the same kind of cell, the critical thickness between the periodic and the aperiodic deformed structure by means of an appropriate numerical technique. As expected, such a threshold was found to be greater than the asymptotic threshold between planar and aperiodic structures. We performed an experiment, which allowed us to give an estimate of the surfacelike elastic constant K24.
Comments

Copyright 1994 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.49.1344

Citation Information
A. Sparavigna, Oleg Lavrentovich and A. Strigazzi. "Periodic Stripe Domains and Hybrid-Alignment Regime in Nematic Liquid-Crystals - Threshold Analysis" Physical Review E Vol. 49 Iss. 2 (1994) p. 1344 - 1352
Available at: http://works.bepress.com/oleg_lavrentovich/69/