The temperature and frequency dependence of thermal dielectric polarization noise was investigated in glycerol and PVC in the vicinity of their glass transitions. polarization fluctuations were observed via voltage noise which was produced within a sample capacitance cell. the high sensitivity and accuracy of the technique provides a powerful probe of dynamics in low-los regimes of various materials.noise spectra had 1/f~ beta form at lower temperatures just bleow the glass transition.in glycerol, the spectral exponent decreased smoothyly with temperature, extrapolating to 1, i.e. 1/f noise, near T_o where relaxation times diverge. The results support the idea that a glassy phase transition occurs in the static limit.
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