Evidence for a universal crossover behaviour of the dynamic glass transition

被引：76

作者：

Schönhals, A ^{[1
]}

机构：

[1] Bundesanstalt Mat Forsch & Prufung, D-12205 Berlin, Germany

来源：

EUROPHYSICS LETTERS | 2001年 / 56卷 / 06期

关键词：

D O I：

10.1209/epl/i2001-00115-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By measuring the complex dielectric function over 15 decades of frequency, the temperature dependence of the mean relaxation time and of the dielectric strength is evaluated for six low-molecular-weight glass-forming liquids and one polymeric melt. For the rst time it could be shown that a universal correlation exists between both these quantities with a sharp defined crossover behaviour in the frequency range between 10(7) Hz and 10(8) Hz. So two dynamical different regions of the alpha -relaxation can be distinguished non-ambiguously.

引用

页码：815 / 821

页数：7

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