Fe20Ag80 granular films prepared by ion-beam cosputtering have been in
vestigated by Mossbauer spectroscopy and de susceptibility measurement
s. The as-sputtered Fe20Ag80 films consist of small magnetic particles
embedded in the Ag matrix. The system is in a superparamagnetic state
at temperatures above 30 K. Below 30 K, the plm begins to show slow m
agnetic relaxation and by further lowering the temperature, a super-sp
in-glass phase is formed around 20 K. (C) 1997 Acta Metallurgica Inc.