Abstract
The time decay of the thermoremanent magnetization has been measured in Ag:Mn (2.6%) below Tg for a wide range of waiting and observation times. A scaling analysis of the ageing process has been applied and the curves obtained for different waiting times could be superimposed on a unique master curve. At each temperature, the master curve defines the response function of the system for a given age. At very small fields, this response function is well represented by the product of a power law and a stretched exponential.