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Effects of pulsed electric fields on a nematic device with a ferroelectric ceramic substrate.
Roy, S. S.; Gleeson, H. F.; Whatmore, R. W.; Shaw, C. P.; Zhang, Q
Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals. 2001;368:9-15.
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Abstract
We report details of the interaction between a thin film of ferroelec. ceramic (lead zirconate-lead titanate) and an overlying layer of nematic liq. crystal. Pulsed elec. fields of 1ms duration and of varying amplitudes and polarity have been used to achieve different degrees of poling within devices in which one substrate includes the ferroelec. ceramic layer. The degree of orientation of the nematic liq. crystal is found to depend on both the amplitude and polarity of the poling voltage employed. The magnitude of the poling voltage necessary to induce reorientation in the liq. crystal compares reasonably with the calcd. value. The reorientation of the nematic liq. crystal due to the interaction with poled grains of PZT is stable for at least several months. [on SciFinder (R)]
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