DIELECTRIC PROPERTIESOF SMECTIC-Cα* PHASE
), Hiroshi Orihara(2),
(1) Technology Center for Nuclear Industrial Materials (PTBIN) - BATAN Kawasan Puspiptek, Serpong 15314, Tangerang
(2) Division of Applied Physics, Graduate Schoof of Engineering Hokkaido University, Kita 8 Nishi 5, Sapporo 060-0808, Japan
Corresponding Author
Abstract
DIELECTRIC PROPERTIESOF SMECTIC-Cα* PHASE. Linear and third-order nonlinear dielectric measurements have been performed within the smectic-Cα* phase of antiferroelectric liquid crystal 4-(1-methyl-heptyloxycarbonyl) phenyl 4-octylcarbonyloxybiphenyl-4-carboxylate (MHPOCBC). In the low temperature region of smectic-Cα* phase, we observed the hysteresis of dielectric constant in cooling and heating process measurement. From the frequency dispersion measurement, it has been found that the frequency relaxation of antiferroelectric Goldstone mode and ‘low frequency mode’, decreased with increasing the temperature until approach the center of the smectic-Cα* phase.
Keywords
Antiferroelectric liquid crystal, nonlinear dielectric constant,MHPOCBC, relaxation mode
DOI: 10.17146/jsmi.2006.7.3.4837
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