Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2007-11-20
2007-11-20
Miller, Brian E. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
11093342
ABSTRACT:
A magnetoresistive sensor based on the spin accumulation effect has an in-stack biasing structure with a ferromagnetic biasing layer that is magnetically-coupled orthogonally with the sensor free ferromagnetic layer across a spacer layer. The sensor has an electrically conductive strip with a first tunnel barrier and a free ferromagnetic layer on the front or sensing end of the strip and second tunnel barrier and a fixed ferromagnetic layer on the back end of the strip. A magnetically-coupling spacer layer is formed on the free layer and the ferromagnetic biasing layer is formed on the spacer layer. The magnetically-coupling layer induces direct orthogonal magnetic coupling between the in-plane magnetization directions of the biasing layer and the free layer.
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Carey Matthew J.
Childress Jeffrey R.
Maat Stefan
Berthold Thomas R.
Hitachi Global Storage Technologies - Netherlands B.V.
Miller Brian E.
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