Magnetoresistive device and method having improved Barkhausen no

Details Magnetoresistive device and method having improved Barkhausen no Magnetoresistive device and method having improved Barkhausen no

1996-02-22

1996-01-16

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360126, G11B 539, G11B 531

Patent

active

054853346

ABSTRACT:
An improved magnetoresistive device and method for fabricating the same which results in improved Barkhausen noise suppression. A generally coplanar device is described having an MR structure conductive region longitudinally biased by opposing permanent magnet layers separated therefrom by a non-magnetic metal or dielectric separation layer. significant reduction of the demagnetization energy near the MR-to-permanent magnet junction is achieved, particularly in the use of an elliptically shaped conductive region and the resultant generally coplanar device is readily fabricated and reproducible using a self-aligning process. The longitudinal bias technique described can be used in conjunction with all known transverse bias techniques.

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