Magnetoresistive head having a stepped magnetoresistive film ele

Details Magnetoresistive head having a stepped magnetoresistive film ele Magnetoresistive head having a stepped magnetoresistive film ele

1994-03-23

1997-02-04

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

056005180

ABSTRACT:
A magnetoresistive head for use in, for example, a magnetic recording/reproducing device such as a magnetic disc unit is provided. This magnetoresistive head includes a substrate, a magnetoresistive element film, first and second antiferromagnetic films, and a first and second lead layers mounted on the first and second antiferromagnetic films for supplying a sense current to the magnetoresistive element film. The magnetoresistive element film includes first and second stepped side portions each having a thickness smaller than that of a central portion of the magnetoresistive element film which defines a reproducing section. The first and second antiferromagnetic films are formed on the first and second stepped side portions of said magnetoresistive element film. With these arrangements, the Barkhausen noise is reduced greatly while maintaining a reproduced output voltage at a desired level.

REFERENCES:
patent: 4967298 (1990-10-01), Mowry
patent: 5325253 (1994-06-01), Chen et al.

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