PA15 9CB液晶のSm-A相におけるダイレクタの電場・磁場応答緩和過程(2004年日本液晶学会討論会)

概要

論文の詳細を見る
Deuterium NMR spectroscopy has been used to investigate the field-induced director dynamics of deuteriated 4-α, α-d_2-nonyl-4'-cyanobiphenyl (9CB-d_2) in the nematic and smectic A phases, where the director was aligned by a magnetic or an electric field. The technique employed is the same as that in Ref. 1. At each temperature in the nematic phase, all of the deuterium NMR spectra consisted of a single quadrupolar doublet which indicates that the director was uniformly aligned, that is as the expected monodomain. The relaxation behaviour for the director reorientation process in the nematic phase showed good agreement with the prediction of the Leslie-Ericksen hydrodynamic theory. At 46.0 and 46.5℃ in the smectic A phase the director alignment, from being parallel to the magnetic field to parallel to the electric field was quiet slow with a relaxation time of several seconds, presumably because of the layer structure of the smectic phase.
日本液晶学会の論文
2004-09-26