The electric field relaxation data for a model glass were analyzed by using the Havriliak-Negami relaxation function. It was found that the latter function provided a very good description of the imaginary part of the electric modulus at frequencies ranging from 0.01 to 100Hz. However, at low frequencies the latter function failed to predict the levelling off of the real part of the complex conductivity at low frequencies.

C.T.Moynihan: Journal of Non-Crystalline Solids, 1996, 203, 359-63