| 摘要 |
A magnetic head is provided that includes a spin valve sensor, first and second leads for conducting a sense current through the spin valve sensor, first and second gap layers and first and second shield layers wherein the spin valve sensor is sandwiched between the first and second gap layers and the first and second gap layers are sandwiched between the first and second shield layers. The spin valve sensor includes a free layer, an antiparallel (AP) pinned layer and a nonmagnetic electrically conductive spacer film. The AP pinned layer includes first and second ferromagnetic thin films and a nonmagnetic electrically conductive spacer layer wherein the spacer film is sandwiched between the first and second films. The spacer layer is sandwiched between the free layer and the pinned layer and the first and second gap layers are sized so that the free layer is located closer to one of the first and second shield layers than to the other so that a net image sense current field promotes magnetic stability of the free layer.
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