Phase transitions of the ferroelectric liquid crystal were studied by recording low-frequency Raman spectra and three Raman lines at 15,49 and 93cm^(-1) were observed.The intensities of the 15 and 49 cm^(-1) modes reduce to zero at smectic C*transition temperature,and in the isotropic phase the 93cm^(-1) Raman line with partial frequency shift totally disappears.
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机译：Phase evolution, phase transition, raman spectra, infrared spectra, and microwave dielectric properties of low temperature firing (K _(0.5x)Bi_(1-0.5x))(Mo_xV_(1-x))O_4 ceramics with scheelite related structure
