Open AccessДинамика деформации нематика под действием сильных скрещенных электрического и магнитного полей
Author(s) -
А. В. Захаров
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.03.45568.246
Subject(s) - liquid crystal , rotational viscosity , generalization , electric field , condensed matter physics , phase (matter) , field (mathematics) , molecule , materials science , physics , crystallography , chemistry , mathematics , mathematical analysis , quantum mechanics , pure mathematics
A new mode of reorientation of the field of director $$\hat n$$ n ^ of a nematic liquid crystal (LC) encapsulated into a rectangular cell under strong crossed electric ( E ) and magnetic ( B ) fields has been proposed. Numerical calculations performed within the linear generalization of the classical Ericksen–Leslie theory show that transition periodic structures facilitating a decrease in the effective rotational viscosity of a nematic, formed by 4- n -pentyl-4'-cyanobiphenyl (5CB) molecules, may arise during reorientation of $$\hat n$$ n ^ at certain ratios of the moments and momenta per unit volume of the LC phase and when E ≫ E _th. The calculations conducted for 5CB also indicate that the periodic structures formed in a LC cell facilitate a decrease in reorientation time τ_on of the director field.