GMR Effect Due to L1{sub}0 FePt Grains

摘要

The giant magnetoresistance (GMR) effect is found in granular FePt-Ag composite films, which arises from the alignment of Ho FePt grains under a magnetic field. The maximum GMR ratio at room temperature is 0.7, which is much higher than the resistivity enhancement due to the domain wall scattering in highly ordered L1{sub}0 FePt films.