Approximate square-root-time relaxation in glass-forming liquids
Soft Condensed Matter
2013-01-29 v1
Abstract
We present data for the dielectric relaxation of 43 glass-forming organic liquids, showing that the primary (alpha) relaxation is often close to square-root-time relaxation. The better an inverse power-law description of the high-frequency loss applies, the more accurately is square-root-time relaxation obeyed. These findings suggest that square-root-time relaxation is generic to the alpha process, once a common view, but since long believed to be incorrect. Only liquids with very large dielectric losses deviate from this picture by having consistently narrower loss peaks. As a further challenge to the prevailing opinion, we find that liquids with accurate square-root-time relaxation cover a wide range of fragilities.
Keywords
Cite
@article{arxiv.0712.2827,
title = {Approximate square-root-time relaxation in glass-forming liquids},
author = {Albena I. Nielsen and Tage Christensen and Bo Jakobsen and Kristine Niss and Niels Boye Olsen and Ranko Richert and Jeppe C. Dyre},
journal= {arXiv preprint arXiv:0712.2827},
year = {2013}
}