Longitudinal bias stack for a current-perpendicular-to-plane (cpp) read sensor

摘要: A read head having an improved longitudinal bias stack for stabilizing the sense layer structure of a CPP sensor is proposed. The separated by insulation from in each two side regions, and sandwiched together with between lower upper ferromagnetic shields head. In preferred embodiment invention, mainly comprises Fe—Pt without any seed layers, thus thickness alone defines spacing sensor. Since layers exhibits good in-plane hard-magnetic properties after annealing narrow, stabilization scheme effective.