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  • Title: Dynamic local-layer response of surface-stabilized ferroelectric liquid crystals to a high electric field by time-resolved x-ray microdiffraction.
    Author: Takahashi Y, Iida A, Takanishi Y, Ogasawara T, Nakata M, Ishikawa K, Takezoe H.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2003 May; 67(5 Pt 1):051706. PubMed ID: 12786163.
    Abstract:
    Time-resolved synchrotron x-ray microdiffraction measurements have directly revealed the dynamic local-layer response to the high electric field in a surface-stabilized ferroelectric liquid crystal. The irreversible layer transformation under the increasing electric field is found to consist of two stages; the initial vertical chevron structure transforms to the alternate vertical and horizontal chevrons and, with increasing field, the chevron angle decreases and the horizontal chevron structure develops. The time-resolved microdiffraction measurement has clarified the detailed reversible layer transformation between the mostly horizontal chevron at the high field and the so-called quasibookshelf at the low field during the ac field application. The transient layer response time is about 0.1-0.2 and 0.3-0.4 ms for falling and rising edges, respectively, and is slightly longer than the optical response time. The layer transformation is discussed in terms of electric torque and surface anchoring. The local-layer response in the antiferroelectric liquid crystal is also discussed for comparison.
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