Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2007-01-30
2007-01-30
Castro, Angel (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
10903173
ABSTRACT:
An extraordinary magnetoresistance (EMR) sensor uses a ferromagnetic multilayer to provide perpendicular magnetic biasing for the sensor. The ferromagnetic multilayer has intrinsic perpendicular magnetic anisotropy and is preferably on top of the EMR active film. The multilayer comprises alternating films of Co, Fe or CoFe and Pt, Pd or PtPd with the preferred multilayer being alternating Co/Pt or Co/Pd films. A diffusion barrier may be located between the EMR active film and the ferromagnetic multilayer.
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Carey Matthew J.
Gurney Bruce A.
Maat Stefan
Smith Neil
Berthold Thomas R.
Castro Angel
Hitachi Global Storage Technologies - Netherlands B.V.
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