Effects of pulsed electric fields on a nematic device with a ferroelectric ceramic substrate

SS Roy, HF Gleeson, RW Whatmore, CP Shaw, Q Zhang

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    Abstract

    We report details of the interaction between a thin film of ferroelectric ceramic (lead zirconate-lead titanate) and an overlying layer of nematic liquid crystal. Pulsed electric 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 ferroelectric ceramic layer. The degree of orientation of the nematic liquid 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 liquid crystal compares reasonably with the calculated value. The reorientation of the nematic liquid crystal due to the interaction with poled grains of PZT is stable for at least several months.
    Original languageEnglish
    Pages (from-to)3777-3783
    JournalMolecular Crystals and Liquid Crystals
    Volume368
    Publication statusPublished - 2001

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    Roy, SS., Gleeson, HF., Whatmore, RW., Shaw, CP., & Zhang, Q. (2001). Effects of pulsed electric fields on a nematic device with a ferroelectric ceramic substrate. Molecular Crystals and Liquid Crystals, 368, 3777-3783.