Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1999-02-23
Eur. Phys. J. E 2, 67 (2000)
Physics
Condensed Matter
Disordered Systems and Neural Networks
7 pages including 6 figures submitted to Eur. Phys. J. E
Scientific paper
10.1007/s101890050041
The Nagel-scaling and the modified scaling procedure proposed recently by Dendzik et al. have been applied to broadband dielectric data on two glass- forming liquids (glycerol and propylene carbonate) and three plastic crystals (ortho-carborane, meta-carborane, and 1-cyano-adamantane). Our data extend the upper limit of the abscissa range to considerably higher values than in previously published analyses. At the highest frequencies investigated, deviations from a single master curve show up which are most pronounced in the Dendzik-scaling plot. The loss curves of the plastic crystals do not scale in the Nagel-plot, but they fall onto a separate master curve in the Dendzik-plot. In addition, we address the question of a possible divergence of the static susceptibility near the Vogel-Fulcher temperature. For this purpose, the low-temperature evolution of the high-frequency wing of the dielectric loss peaks is investigated in detail. No convincing proof for such a divergence can be deduced from the present broadband data.
Brand R.
Loidl Alois
Lunkenheimer P.
Schneider Ulrich
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