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We report on the observation of flexoelectricity of an asymmetric “swallow-tail” compound by dissolving it in a BMAOB nematic matrix and studying the thickness dependence of the period of longitudinal (2nd order) domains in planar layers under d.c. excitation. From the experimental data and Bobilev-Pikin theory we estimate the value of the flexocoefficient difference |e*| = |e 1z - e 3x| as a function of the evaluation about expected concentration and evaluate an extrapolated value of this difference for the “swallow-tail” compound.
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Marinova et al. (2001) studied this question.
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