Time scaling of the ageing process in spin-glasses : a study in CsNiFeF6

Abstract

The ageing properties of the time decay of the thermoremanent magnetization (TRM) in CsNiFeF 6 are analysed on the basis of a phenomenological theory of times scaling as yet used in the case of the mechanical properties of glassy polymers. We find that the time decay law takes the form of the product of a stretched exponential by a power law Analyse des proprietes de vieillissement de la decroissance de l'aimantation thermoremanente en fonction du temps a partir d'une theorie phenomenologique d'echelle, deja utilisee pour les proprietes mecaniques des polymeres vitraux