Department of Physics, 1Center for Materials Analysis and National Laboratory of Solid-State Microstructures, 2Center for Computation, Nanjing University, Nanjing 210008
Analysis of Quasielastic Light Scattering in Ferroelectric Liquid Crystal
ZHANG Ping;YIN Zhen;ZHANG Mingsheng1;HUANG Qiang2
Department of Physics, 1Center for Materials Analysis and National Laboratory of Solid-State Microstructures, 2Center for Computation, Nanjing University, Nanjing 210008
Abstract： Temperature dependence of Raman spectra of ferroelectric liquid crystal MBOPDOB is examined in spectral region 0-30cm-1 with spectral emphasis on the quasielastic light scattering near solid-Sm C* transition. The quasielastic components are well fitted to Debye-type susceptibility function. With increase of temperature the inverse of the relaxation time T linearly goes to zero in the temperature range below the transition, manifesting a critical slowing-down. The relaxation time keeps same big value in the Sm C* phase as that at the transition point owing to long orientational relaxation in the liquid phase.
1994, Vol. 11 
