Jpn. J. Appl. Phys. 26 (1987) pp. L1787-L1789 |Next Article| |Table of Contents|
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Letter
Giant Electroclinic Effect in Chiral Smectic A Phase of Ferroelectric Liquid Crystals
Shin-ichi Nishiyama,
Yukio Ouchi,
Hideo Takezoe and
Atsuo Fukuda
Tokyo Institute of Technology, Department of Organic and Polymeric Materials
(Received August 24, 1987; accepted for publication October 14, 1987)
A giant electroclinic effect was observed in smectic A (SA) phases of various ferroelectric liquid crystals with spontaneous polarizations as large as several hundred µC/m2. An induced tilt angle increased linearly with an electric field, E, and tended to saturate toward 16° . The induced tilt angle of a few degrees was observable even at a temperature 20° above the SA-SC* transition. It was confirmed using several compounds that the induced tilt angle is proportional to the spontaneous polarization in SC*. The response time is less than 1 µs and, when normalized by the induced tilt angle, linearly depends on E, i.e., τ'/θ0∝E.
URL:
http://jjap.jsap.jp/link?JJAP/26/L1787/
DOI: 10.1143/JJAP.26.L1787
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