Large Magnetoresistance of Field-Induced Giant Ferrimagnetic Multilayers

Abstract

Multilayers consisting of two magnetic components with different anisotropies were prepared by successively depositing Co, Cu, Ni₈₀Fe₂₀ and Cu layers. By applying a moderate field, the two magnetizations are oriented antiparallel with each other, and then the electric resistance significantly increases due to spin-dependent electron scattering. A large magnetoresistance change, 9.9% at 300 K, was observed in [Co(30 Å)/Cu(50 Å)/NiFe(30 Å)/Cu(50 Å)]×15.