Abstract
Granular Fe50Pt50-Ag composite films are obtained by annealing FePt/Ag multilayer films. Upon annealing the layered structure is collapsed and L10 phase fct Fe50Pt50grains are formed. Giant magnetoresistance (GMR) effect is found in this system, which originates from the spindependent scattering of conduction electrons at the interface between FePt and Ag grains. The GMR ratio depends on the multilayer film structure and the annealing conditions, showing the correlation between the filmmicrostructure and GMR effect in granule-type composite films.
