Thin film magnetic head having hard films for magnetizing a shie

Details Thin film magnetic head having hard films for magnetizing a shie Thin film magnetic head having hard films for magnetizing a shie

1998-04-30

2000-01-25

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

060184434

ABSTRACT:
Hard films consisting of a permanent magnet material are formed on both the sides of shield layers to orient the magnetization of the shield layers in an easy axis of magnetization (X direction), thereby putting the shield layers into a single domain state. Therefore, anisotropic dispersion does not occur in the shield layers, the hysteresis of a thin film magnetic head is eliminated as a whole, a coercive force becomes very small, and the magnetic reversibilities of the shield layers in a direction perpendicular to the drawing paper surface becomes preferable. For this reason, the reliability of a reproduced output signal from a magnetoresistance element layer is improved.

REFERENCES:
patent: 5515221 (1996-05-01), Gill et al.
patent: 5880910 (1999-03-01), Shouji

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