Fast dynamics of glass-forming glycerol studied by dielectric spectroscopy

Abstract

Dielectric spectroscopy up to 370 GHz has been performed on supercooled glycerol for temperatures between 250 and 330 K. The high-frequency dielectric loss, ε, has been investigated by coherent-source submillimeter-wave spectroscopy. Special attention is given to the dielectric loss in the crossover regime from the structural relaxation to the far-infrared response. A minimum is observed in ε(ν) which is compared to theoretical concepts that predict fast relaxational processes. © 1996 The American Physical Society.