Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1996-08-06
1999-01-19
Zirker, Daniel
Stock material or miscellaneous articles
Composite
Of inorganic material
428692, 428900, 360115, 360123, 360125, 307106, 307415, 336213, 335297, 148304, 148403, G11B 566, G11B 584
Patent
active
058612203
ABSTRACT:
A magnetic storage medium comprises a keeper layer of soft magnetic, saturable material disposed upon a magnetic storage layer. The keeper layer is disposed above the magnetic storage layer, and a non-magnetic "break" layer may be used between the keeper and the storage layer to reduce the exchange coupling between these layers. To increase the ability of the keeper layer to shunt flux from the magnetic storage layer, a longitudinal anisotropy is induced in the keeper layer. This establishes a desired magnetic orientation of the keeper which facilitates maintaining the regularity (i.e., relative uniformity) of the transitions, and reducing the magnetic interaction between transitions as the spacing between transitions is reduced to provide denser media. Specifically, the longitudinal anisotropy may be oriented either circumferentially or radially relative to the plane of rotation of the magnetic storage layer.
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Ampex Corporation
Mesaros John G.
Zirker Daniel
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