Scaling of broadband dielectric data of glass-forming liquids and plastic crystals

U. Schneider; R. Brand; P. Lunkenheimer; A. Loidl

doi:10.1007/s101890050041

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Scaling of broadband dielectric data of glass-forming liquids and plastic crystals

U. Schneider·R. Brand·P. Lunkenheimer·A. Loidl

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Abstract

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.

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U. Schneider, R. Brand, P. Lunkenheimer, A. Loidl. 1999-11-09. Scaling of broadband dielectric data of glass-forming liquids and plastic crystals. https://doi.org/10.1007/s101890050041

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