The Formation and Propagation of Fronts at the Electric Field Induced Bend Freedericksz Transition
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The electric field induced bend Freedericksz transition in 5CB is first order. At the threshold value of the applied voltage, the deformed and undeformed states can coexist in equilibrium. The width of the front separating the two states gives a measure of the abruptness of the transition. If the applied voltage differs from its threshold value, the stable state invades the metastable one, and the front separating the two states moves. We present data for the velocity of front propagation in 5CB, and compare results with the predictions of theory.
KeywordsApplied Voltage Nematic Liquid Crystal Front Propagation Nematic Director Landau Free Energy
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