Physics – Condensed Matter – Materials Science
Scientific paper
2004-12-06
Physics
Condensed Matter
Materials Science
6 pages, 5 figures
Scientific paper
10.1016/j.jnoncrysol.2005.03.074
The field-dependent ion transport in thin samples of different glasses is characterised by means of nonlinear conductivity spectroscopy. AC electric fields with strengths up to 77 kV/cm are applied to the samples, and the Fourier components of the current spectra are analysed. In the dc conductivity regime and in the transition region to the dispersive conductivity, higher harmonics in the current spectra are detected, which provide information about higher--order conductivity coefficients. Our method ensures that these higher--order conductivity coefficients are exclusively governed by field--dependent ion transport and are not influenced by Joule heating effects. We use the low-field dc conductivity $\sigma_{1,dc}$ and the higher--order dc conductivity coefficient $\sigma_{3,dc}$ to calculate apparent jump distances for the mobile ions, $a_{\rm app}$. Over a temperature range from 283 K to 353 K, we obtain values for $a_{app}$ between 39 \AA $ $ and 55 \AA . For all glasses, we find a weak decrease of $a_{\rm app}$ with increasing temperature. Remarkably, the apparent jump distances calculated from our data are considerably larger than typical values published in the literature for various ion conducting glasses. These values were obtained by applying dc electric fields. Our results provide clear evidence that the equation used in the literature to calculate the apparent jump distances does not provide an adequate physical description of field-dependent ion transport.
Murugavel Sevi
Roling Bernhard
No associations
LandOfFree
Application of Nonlinear Conductivity Spectroscopy to Ion Transport in Solid Electrolytes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Application of Nonlinear Conductivity Spectroscopy to Ion Transport in Solid Electrolytes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Application of Nonlinear Conductivity Spectroscopy to Ion Transport in Solid Electrolytes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-40683