2015•Applied Physics LettersRequires access
Asymmetric director structures and flexoelectricity in nematic pi-cell devices
Chloe C. Tartan, Steve J. Elston
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Abstract
The sum of the flexoelectric coefficients in a liquid crystal material has been measured in nematic pi-cell devices, based on a method that exploits the asymmetry in the director configurations of the different states in a pi-cell, the uniform surface alignment polarities, and the influence of ions. A value of |e1 + e3| = 10 pC m−1 was measured from data-theory comparisons in the standard commercial eutectic E7 nematic liquid crystal mixture.