In-Plane Polarization Reversal and Boundary Effect in Transferred Ferroelectric Liquid Crystal Thin Film

概要

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A new technique for the direct evaluation of the influences of the substrate/liquid crystal (LC) and airILC boundary conditions on molecular alignment and dynamics using a transferred ferroelectric liquid crystal film has been proposed. The in-plane polarization reversal current in the transferred film has been measured as a function of film thickness and temperature using an interdigitated electrode on the substrate. It is found that spontaneous polarization in a thin film is influenced by the boundary conditions. The polarization reversal current has been observed even above the Curie temperature in a thin film, which is enhanced with decreasing film thickness. This anomaly is discussed in terms of the surface clinic effect of the molecules at the air/LC interface, and the flexoelectric effect.
社団法人応用物理学会の論文
2002-08-15