Relaxation distribution function in dipole glass in slow dynamics region

Abstract

Relaxation time distribution function g(τ) was obtained by use of the Tikhonov regularization analysis from the low frequency dielectric data of a dipole glass (DRADP-x) at low temperatures. Temperature dependence of the average relaxation time, 〈τ〉=∫τg(τ,T)d(ln τ) was found to obey the empirical Vogel-Fulcher law. The dynamically correlated cluster model, however, could not reproduce our g(τ) and failed to give a satisfactory best fit to our dielectric data of a dipole glass.