THERMAL-CONVECTION IN A PLANAR NEMATIC LIQUID-CRYSTAL WITH A STABILIZING MAGNETIC-FIELD

Authors
BERGE LI AHLERS G CANNELL DS
Citation
Li. Berge et al., THERMAL-CONVECTION IN A PLANAR NEMATIC LIQUID-CRYSTAL WITH A STABILIZING MAGNETIC-FIELD, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 48(5), 1993, pp. 180003236-180003239
Citations number
26
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
Journal title
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics → ACNP
ISSN journal
1063651X
Volume
48
Issue
5
Year of publication
1993
Pages
180003236 - 180003239
Database
ISI
SICI code
1063-651X(1993)48:5<180003236:TIAPNL>2.0.ZU;2-L
Abstract
We report experimental results for thermal convection in a horizontal layer of a planar nematic liquid crystal [4-n-pentyl-4'-cyanobiphenyl (5CB)] heated from below in a uniform horizontal magnetic field H. The threshold for convection and the critical wave-vector components were measured as a function of H. The convection rolls were oriented with their axes normal (oblique) to the field direction for H < H(L1) (H(L1 ) < H < H(L2)), where H(L1) and H(L2) are the lower and upper Lifshitz fields, respectively. Above H(L2) the orientation was parallel to H. The dependence of the orientation on H near H(L1) and H(L2) agrees wit h theoretical predictions.