Excess wing in the dielectric loss of glass-forming ethanol: A relaxation process

被引：75

作者：

Brand, R ^{[1
]}

Lunkenheimer, P ^{[1
]}

Schneider, U ^{[1
]}

Loidl, A ^{[1
]}

机构：

[1] Univ Augsburg, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.62.8878

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A detailed dielectric investigation of liquid, supercooled liquid, and glassy ethanol was performed, extending the frequency and temperature range of previous investigations. The results reveal a third relaxation process, in addition to the two processes already known. In this respect the relaxational behavior of ethanol resembles that of other primary alcohols. The relaxation time of this process exhibits strong deviations from thermally activated behavior. Most important, this process is the cause of the apparent excess wing, which was claimed to be present in the dielectric loss spectra of glass-forming ethanol. In addition, marked deviations of the spectra of ethanol from the scaling proposed by Dixon and Nagel have been detected.

引用

页码：8878 / 8883

页数：6

共 56 条

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[2] Reply to "Comment on 'Merging of the α and β relaxations in polybutadiene:: A neutron spin echo and dielectric study' " [J].