Volume 43, Number 3, August I 1998
|Page(s)||308 - 313|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Low-frequency dielectric fluctuations near the glass transition
Department of Physics and Center for Interdisciplinary Research on Complex Systems Northeastern University - Boston, MA 02115, USA
Accepted: 9 June 1998
The temperature and frequency dependence of thermal electric polarization noise was investigated in glycerol at and below the glass transition temperature. Polarization fluctuations were observed via voltage noise which was produced within a sample capacitance cell in equilibrium. The high sensitivity and accuracy of the technique provides a useful probe of dynamics in low-loss regimes of various dielectric materials. Noise spectra exhibit a power law form at lower temperatures just below the glass transition, where the noise also exhibits unusual aging effects. The spectral exponent decreases with temperature, extrapolating to 1.0, i.e. 1/f noise, at a critical temperature where the noise magnitude extrapolates to a non-zero value. The results support the possibility that a glassy phase transition occurs in the static limit.
PACS: 64.70.Pf – Glass transitions / 61.20.Lc – Time-dependent properties; relaxation / 61.43.Fs – Glasses
© EDP Sciences, 1998
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.