Barberpole MR sensor having interleaved permanent magnet and mag

Details Barberpole MR sensor having interleaved permanent magnet and mag Barberpole MR sensor having interleaved permanent magnet and mag

1996-06-20

1998-04-07

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

057371563

ABSTRACT:
A barberpole magnetoresistive (MR) sensor has a series of permanent magnet strips interleaved with a series of magnetoresistive strips. Conductive barberpole strips are canted across the sensor and connect one magnetoresistive strip, over a permanent magnet strip, to another magnetoresistive strip. The permanent magnet strips help to provide a uniform magnetic field throughout the sensor, thereby making the sensor more immune to harm from an external magnetic field and more likely to reset into a single magnetic domain oriented as desired if an external magnetic field should cause the sensor to fracture into multiple magnetic domains.

REFERENCES:
patent: 4972284 (1990-11-01), Smith et al.
patent: 5055786 (1991-10-01), Wakatuski et al.
patent: 5402292 (1995-03-01), Komoda et al.
patent: 5412524 (1995-05-01), Naguta et al.

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