Method and system for providing a read transducer having an improved composite magnetic shield

A magnetic transducer having an air-bearing surface (ABS) and comprising:

• a first shield;
• a read sensor;
• and
• a second shield, the read sensor residing between the first shield and the second shield, the second shield including a first ferromagnetic layer, a nonmagnetic spacer layer, a second ferromagnetic layer and a pinning layer, the nonmagnetic spacer layer residing between the first ferromagnetic layer and the second ferromagnetic layer, the first ferromagnetic layer residing between the read sensor and the nonmagnetic spacer layer, the pinning layer being adjacent to the second ferromagnetic layer, the first ferromagnetic layer being coupled antiparallel with the second ferromagnetic layer, at least one of the first ferromagnetic layer and the second ferromagnetic layer including a CoFe portion adjacent to the nonmagnetic spacer layer;
• wherein the CoFe portion includes at least thirty-five percent and not more than forty atomic percent Fe.

A method for providing a magnetic read transducer having an air-bearing surface (ABS) comprising:

• providing a first shield;
• providing a read sensor;
• and
• providing a second shield, the read sensor residing between the first shield and the second shield, the second shield including a first ferromagnetic layer, a nonmagnetic spacer layer, a second ferromagnetic layer and a pinning layer, the nonmagnetic spacer layer residing between the first ferromagnetic layer and the second ferromagnetic layer, the first ferromagnetic layer residing between the read sensor and the nonmagnetic spacer layer, the pinning layer being adjacent to the second ferromagnetic layer, the first ferromagnetic layer being coupled antiparallel with the second ferromagnetic layer, at least one of the first ferromagnetic layer and the second ferromagnetic layer including a CoFe portion adjacent to the nonmagnetic spacer layer, the CoFe portion including at least twenty-five atomic percent and not more than fifty atomic percent Fe;
• wherein at least one of the first ferromagnetic layer and the second ferromagnetic layer includes a CoFe layer corresponding to the CoFe portion and a NiFe layer, the CoFe layer residing between the NiFe layer and the nonmagnetic spacer layer.