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Liquid Crystals
Year: 2008  |  Volume: 35  |  Issue: 9  |  Page No.: 1053 - 1059

Physical properties of two systems with induced antiferroelectric phase

Marzena Tykarska, Roman Dabrowski, Jan Przedmojski, Wiktor Piecek, Katarzyna Skrzypek, Bertrand Donnio and Daniel Guillon    

Abstract: Two ferroelectric three-ring chiral esters, one with a partially fluorinated alkyl chain and another with a cyano terminal group, were mixed with a structurally similar compound having an alkyl terminal chain. In their mixtures an antiferroelectric phase was induced. The phase behaviour, spontaneous polarisation, tilt angle, smectic layer spacing and helical pitch of both systems were determined. The mechanism of the induction of an antiferroelectric phase is different in both cases, with highly tilted phases in former system and less tilted phases in the latter.

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