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The surface-induced molecular tilt near the second-order smectic-A (untilted)--smectic-C (tilted) transition is studied in freely suspended films consisting of hundreds of molecular layers. As the bulk transition temperature Tc is approached from above, the overall amount of the surface-induced tilt, which is far above Tc restricted to a few molecular layers near the surface, grows in a divergencelike behavior. The experimental results are compared with the Fisher--de Gennes model of critical adsorption.
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Bahr et al. (1996) studied this question.
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