title: Ionic conduction in glass: new information on the interrelation between the "Jonscher behavior" and the "nearly constant-loss behavior" from broadband conductivity spectra.
abstract: We analyze broadband ac conductivity spectra of various ion conducting glasses with regard to the composition dependence of the "Jonscher behavior" and of the "nearly constant-loss behavior." In the temperature range of our experiments (173 K< or =T< or =573 K), both types of behavior are closely related, indicating that both arise from ion hopping. However, the "nearly constant-loss behavior" observed at temperatures below 100 K seems to be caused by other dynamic processes.
authors.affiliation: Institut für Physikalische Chemie and Sonderforschungsbereich 458, Westfälische Wilhelms-Universität Münster, Schlossplatz 4/7, 48149 Münster, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Roling
authors.forename: C
authors.initials: C
authors.lastname: Martiny
authors.forename: S
authors.initials: S
authors.lastname: Murugavel