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US 6,201,673 B1Granted
System for biasing a synthetic free layer in a magnetoresistance sensor
AssigneeRead-Rite Corporation
InventorsRobert E. Rottmayer, Jain-Gang Zhu, Kenneth Everett Knapp, Yiming Huai
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Abstract
A system and method for providing a magnetoresistive head is disclosed. The method and system include providing a spin valve including a synthetic free layer. The synthetic free layer includes a ferromagnetic layer. The method and system also include providing an antiferromagnetic biasing layer exchange coupled to a first portion of the ferromagnetic layer. The antiferromagnetic biasing layer magnetically biases the synthetic free layer to ensure the single domain structure and reduce noise.
Claims8
A magnetoresistive head comprising:
- a spin valve including a synthetic free layer, the synthetic free layer including a ferromagnetic layer and a second ferromagnetic layer antiferromagnetically coupled to the ferromagnetic layer;
- and an antiferromagnetic biasing layer exchange coupled to a first portion of the ferromagnetic layer;
- wherein the antiferromagnetic biasing layer magnetically biases the synthetic free layer.
Dependencies are inferred from the claim text.