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The anticlinic interlayer coupling coefficient U was evaluated as a function of temperature for a pitch-compensated liquid crystal by optical observation of the electric field-induced optic mode. U was found to exhibit an unusual ``S-shaped'' dependence on temperature, with values ranging between 0.4×10⁴ and 2.2×10⁴ergcm^-3 over a 10 ^∘{}C temperature range below the smectic-A--smectic-CA* phase-transition temperature. The results are in good agreement with estimates for U based upon the threshold field for the onset of solitary waves, and provide strong support in the low-field regime for the single Fourier component model proposed by Li et al. [Phys. Rev. B 52, R13 075 (1995)].
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Kimura et al. (1999) studied this question.
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