Patent ID: 8223463

Claim:
A magnetic read head comprising a magnetoresistive sensor, wherein the magnetoresistive sensor has a laminated structure which comprises: a magnetization pinned layer; an antiferromagnetic layer for pinning a magnetization of the magnetization pinned layer; a non-magnetic intermediate layer; a magnetization free layer; and a magnetization stable layer; wherein the magnetization stable layer comprises: a non-magnetic coupling layer; a first ferromagnetic stable layer; an antiparallel coupling layer; and a second ferromagnetic stable layer; wherein a magnetization of the first ferromagnetic stable layer and a magnetization of the second ferromagnetic stable layer are coupled in an antiparallel alignment by the antiparallel coupling layer, wherein magnetization quantities of the first ferromagnetic stable layer and magnetization quantities of the second ferromagnetic stable layer are substantially equal, wherein the antiferromagnetic layer is the only layer of antiferromagnetic material in the laminated structure, wherein a magnetization of the magnetization free layer and a magnetization of the first ferromagnetic stable layer are coupled in a parallel or an antiparallel alignment by the non-magnetic coupling layer.