Patent ID: 8116043

Claim:
A magnetoresistive structure configured for use in a magnetic transducer comprising: a pinning layer; a synthetic antiferromagnetic (SAF) adjacent to the pinning layer, the SAF including a pinned layer, a reference layer, and a nonmagnetic spacer layer between the pinned layer and the reference layer, the pinned layer being magnetically coupled with the reference layer and including a plurality of sublayers, a first sublayer of the plurality of sublayers having a first blocking temperature distribution (T BD ) and a first exchange energy, a second sublayer of the plurality of sublayers having a second T BD and a second exchange energy, the first sublayer residing between the pinning layer and the second sublayer, the first T BD being greater than the second T BD , the first exchange energy being less than the second exchange energy; a nonmagnetic layer, the SAF residing between the nonmagnetic layer and the pinning layer; and a sensor layer, the nonmagnetic layer residing between the SAF and the sensor layer.