Patent ID: 7064938

Claim:
A magnetic read head including: nonmagnetic electrically nonconductive first and second read gap layers; the spin valve sensor being located between the first and second read gap layers; ferromagnetic first and second shield layers; the first and second read gap layers being located between the first and second shield layers; and the spin valve sensor including: a ferromagnetic pinned layer structure that has a magnetic moment; a pinning layer exchange coupled to the pinned layer structure for pinning the magnetic moment of the pinned layer structure; a free layer structure; a nonmagnetic electrically conductive spacer layer located between the free layer and the pinned layer structure; and the free layer structure having a first free layer of cobalt iron sputter deposited directly on the spacer layer in a nitrogen atmosphere and a second free layer composed of nickel iron sputter deposited directly on the first free layer in a nitrogen atmosphere wherein the first free layer is cobalt iron (Co 90 Fe 10 ) and the second free layer is nickel iron (Ni 83 Fe 17 ).