Director textures of the N?el inversion wall in a liquid crystal polymer
Journal
Philosophical Magazine Part B
Journal Volume
76
Journal Issue
6
Pages
951-960
Date Issued
1997
Date
1997
Author(s)
Abstract
Abstract A solution of the director orientation function is presented for Nëel inversion walls created in a liquid crystal by application of a magnetic field. The theoretical model is used to simulate director trajectories across walls as a function of both the elastic anisotropy and the orientation of the wall with respect to the applied field. The gradual transition of the defect structures from Nëel bend walls to Nëel splay walls as the angle between the wall and the magnetic field is varied is also presented. Micrographs obtained via atomic force microscopy on a thermotropic liquid crystalline polymer are used to test and evaluate the theoretical model. Visualization of director textures using the lamellar decoration technique shows the theoretical and experimental results to be in good agreement. The results were used to determine that the sample had an elastic anisotropy of approximately 0.5, implying that k11 = 3k33.
SDGs
Type
journal article
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