Relation between stretched-exponential relaxation and Vogel–Fulcher behavior above the glass transition
- 1 April 1989
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 90 (7) , 3885-3886
- https://doi.org/10.1063/1.455799
Abstract
We point out a relationship between stretched‐exponential relaxation, φ(t)=φ0 exp[−(t/τ)β], and the Vogel–Fulcher temperature dependence, τ=τ0 exp[A/(T−T0)], seen in many glasses near the glass transition. Recent experiments have shown that, in some glasses, the exponent β decreases as the temperature is lowered towards T0. Under rather nonrestrictive assumptions, this temperature dependence in φ(t) leads directly to Vogel–Fulcher behavior.Keywords
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