Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements

SS Roy; W Lehmann; E Gebhard; C Tolksdorf; R Zentel; F Kremer

Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements

SS Roy, W Lehmann, E Gebhard, C Tolksdorf, R Zentel, F Kremer

Research output: Contribution to journal › Article

Abstract

We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.

Original language	English
Pages (from-to)	253-268
Journal	Molecular Crystals and Liquid Crystals
Volume	375
Publication status	Published - 2002

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@article{fecf3ca3d643411f98aa563daf0d9753,

title = "Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements",

abstract = "We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.",

author = "SS Roy and W Lehmann and E Gebhard and C Tolksdorf and R Zentel and F Kremer",

note = "9th International Topical Meeting on Optics of Liquid Crystals, SORRENTO, ITALY, OCT 01-06, 2001",

year = "2002",

language = "English",

volume = "375",

pages = "253--268",

journal = "Molecular Crystals and Liquid Crystals",

issn = "1542-1406",

publisher = "Taylor & Francis",

}

TY - JOUR

T1 - Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements

AU - Roy, SS

AU - Lehmann, W

AU - Gebhard, E

AU - Tolksdorf, C

AU - Zentel, R

AU - Kremer, F

N1 - 9th International Topical Meeting on Optics of Liquid Crystals, SORRENTO, ITALY, OCT 01-06, 2001

PY - 2002

Y1 - 2002

N2 - We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.

AB - We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.

M3 - Article

VL - 375

SP - 253

EP - 268

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 1542-1406

ER -