Magnetic disc unit having a plurality of magnetic heads which in

Details Magnetic disc unit having a plurality of magnetic heads which in Magnetic disc unit having a plurality of magnetic heads which in

1994-10-17

1996-12-31

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5147

Patent

active

055900089

ABSTRACT:
A magnetic disc unit has a thin film magnetic head in which a lower magnetic core and an upper magnetic core form a magnetic circuit. The upper magnetic core is constructed by magnetic films having at least two layers. A saturation magnetic flux density of the inside magnetic film, of the magnetic films having at least two layers, facing a magnetic gap of the magnetic circuit is larger than that of the outside magnetic films of the upper magnetic core and the lower magnetic core.

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IEEE Transactions on Magnetics, vol. 25, #5, Sep. 1989, "Delayed Relaxation in Thin-Film Heads", Klaassen et al.

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