Dresden 2009 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 8: Glass I

DF 8.4: Vortrag

Dienstag, 24. März 2009, 11:00–11:20, WIL B321

Correlation analysis of dielectric polarization noise in glass formers — •Jens Schindele, Andreas Reiser, and Christian Enss — Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg

The analysis of dielectric polarization noise is a powerful tool to investigate relaxation processes in dielectric or ionic fluids, glass-forming liquids or glasses. To determine the polarization noise, we measure voltage fluctuations between electrodes immersed in the sample. We show time series analyses of voltage fluctuations of typical glass formers in the temperature range between room temperature and the glass transition temperature. Correlations in space and time probed by a three electrode setup. This enables us to follow the random walk of an effective polarization vector in two dimensions.