Patent ID: 6728078
Filing Date: 2004-04-27
Classification: B82Y,G11B

Abstract:
A magnetic read head which has an air bearing surface (ABS), comprising:a spin valve sensor including: nonmagnetic first and second spacer layers; a ferromagnetic free layer located between the first and second spacer layers; ferromagnetic first and second antiparallel (AP) pinned layer structures; the first and second spacer layers being located between the first and second AP pinned layer structures; antiferromagnetic first and second pinning layers; the first and second AP pinned layer structures being located between and interfacing the first and second pinning layers respectively; the free layer being composed of cobalt iron nickel (Co70Fe15Ni15); each of the first and second AP pinned layer structures having ferromagnetic first and second antiparallel (AP) pinned layers and an antiparallel (A/P) coupling layer with the AP coupling layer located between the first and second AP pinned layers; and each of the first and second AP pinned layers of each of the first and second AP pinned layer structures being composed of cobalt iron (Co40-70Fe60-30).