Patent ID: 7440241

Claim:
A current perpendicular-to-plane magnetoresistive head comprising: a magnetoresistive film having a pinned layer in which a magnetization is fixed in a first direction, a free layer whose magnetization direction is changed by an external magnetic field, and an intermediate layer laminated between said pinned layer and said free layer; a system of applying a longitudinal biasing magnetic field to make said free layer a single magnetic domain; a pair of electrodes to flow a current to said magnetoresistive film, wherein, said system of applying a longitudinal biasing magnetic field includes a separate layer, a first ferromagnetic layer, a 90-degree magnetic interlayer coupling layer, and a second ferromagnetic layer whose magnetization is fixed in said first direction, laminated in order on the face of the side opposite to said intermediate layer and connected to said free layer, and said first ferromagnetic layer is interlayer-coupled to said second ferromagnetic layer in a nearly orthogonal direction through said 90-degree magnetic interlayer coupling layer and has a magnetization in a nearly orthogonal direction against the magnetization direction of said second ferromagnetic layer under a condition that an external magnetic field is zero.