Issue |
Europhys. Lett.
Volume 43, Number 3, August I 1998
|
|
---|---|---|
Page(s) | 308 - 313 | |
Section | Condensed matter: structure, thermal and mechanical properties | |
DOI | https://doi.org/10.1209/epl/i1998-00357-4 | |
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
Received:
12
March
1998
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.