Dielectric Relaxation in Antiferroelectric Liquid Crystal (MHPOBC)

Abstract

The electric relaxation in the tempreture range between antiferroelectric phase to isotropic of the antiferroelectric liquid crystal MHPOBC[4-(l-methylheptyloxycarbonyl)phenyl4'-octyloxybiphenyl-4-carboxylate] was measured in the frequency between 1Hz and 10MHz. In the SmC_A^* phase, two dielectric relaxation modes were exist, and those modes were observed in the SmC_γ^* phase. We discuss that connection of modes around any phase transtions, especialy SmC_A^* pahse-SmC_γ^* phase trarstion.