Electro-optic switching and dielectric spectroscopy studies of ferroelectric liquid crystals with low and high spontaneous polarization

0350503 - FZÚ 2011 RIV CH eng J - Journal Article
Malik, P. - Raina, K.K. - Bubnov, Alexej - Choudhary, A. - Singh, R.
Electro-optic switching and dielectric spectroscopy studies of ferroelectric liquid crystals with low and high spontaneous polarization.
Thin Solid Films. Roč. 519, č. 3 (2010), 1052-1055. ISSN 0040-6090. E-ISSN 1879-2731
R&D Projects: GA AV ČR IAA100100911; GA AV ČR(CZ) GA202/09/0047
Grant - others:RFASI(RU) 02.740.11.5166
Institutional research plan: CEZ:AV0Z10100520
Keywords : spontaneous polarization * ferroelectric liquid crystal * relaxation frequency * Goldstone mode
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.909, year: 2010

Electro-optic and dielectric studies have been carried out on two ferroelectric liquid crystalline materials: namely, the commercial mixture possessing low spontaneous polarization and pure material with high spontaneous polarization on cells with planar alignment. The calculated values of spontaneous polarization, response time and rotational viscosity were found ~ 240nC/cm2, 20nC/cm2, 1600μs, 500μs, 230kg/ms and 19kg/ms for high and low polarization ferroelectric liquid crystalline materials, respectively. For the ferroelectric liquid crystal with high polarization, the effect of temperature, frequency and bias field on the dielectric properties have been studied and the obtained results were compared to those obtained on the ferroelectric liquid crystalline mixture with low spontaneous polarization.
Permanent Link: http://hdl.handle.net/11104/0190494