Europhys. Lett.
Volume 76, Number 6, December 2006
Page(s) 1137 - 1143
Section Condensed matter: structural, mechanical and thermal properties
Published online 23 November 2006
Europhys. Lett., 76 (6), pp. 1137-1143 (2006)
DOI: 10.1209/epl/i2006-10401-5

On the pressure dependence of fragility

A. Reiser and G. Kasper

Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, D-69120 Heidelberg, Germany

received 17 May 2006; accepted in final form 30 October 2006
published online 23 November 2006

We have investigated the fragility of glycerol, propylene carbonate, and meta-fluoroaniline at pressures up to $700\un{MPa}$ using dielectric spectroscopy. All three small-molecule glass formers do not show a pressure dependence of fragility within experimental error. The ratio of glass transition temperature and Vogel-Fulcher-Tammann temperature is pressure independent. The results are discussed in the frame of the defect diffusion model.

64.70.Pf - Glass transitions.
62.50.+p - High-pressure and shock wave effects in solids and liquids.
77.22.Gm - Dielectric loss and relaxation.

© EDP Sciences 2006