Giant Magnetoresistance in CoCu Granular Alloy Films

抄録

Metastable Co-Cu thin films were sputter-deposited. The relationship between magnetoresistance of CoCu granular film and vacuum annealing temperature, applied magnetic field, and composition of alloy was studied. Co second phase with fcc structure are precipitated after annealing. Giant magnetoresistance (GMR) effect was observed in the nonmagnetic Cu matrix, its magnitude depends on the quantity and size of Co particles.