Top spin valve sensor that has a free layer structure with a cobalt iron boron (cofeb) layer

摘要

A free layer structure is provided with a first layer of cobalt iron boron (CoFeB) for improving soft magnetic properties of the free layer structure in a top spin valve sensor by decreased uniaxial anisotropy H_K, easy axis coercivity H_C and hard axis coercivity H_CK of the free layer structure. The free layer structure also includes a second layer of nickel iron based material and a third layer of cobalt based material disposed adjacent a nonmagnetic conductive spacer layer of a spin valve sensor.