Domains due to Electric and Magnetic Fields in Bulk Samples of Liquid Crystals
Domains are created by electric or magnetic fields in bulk samples initially well aligned. The fields are applied perpendicular to the nematic director, and domains form which appear to be separated by walls. The possibility of inversion walls are considered. When applying electric fields (conduction regime) the space-charge density should be a maximum at the walls because of the conductivity anisotropy. The forces, due to the interaction of the electric field with the space-charge at the walls, tend to shear the sample. Because of shear flow, the director associated with the sample between the walls is turned toward the electric field. This mechanism is also likely to be involved in the dynamic scattering mode.
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