Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1996-07-17
1998-06-02
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 533
Patent
active
057610100
ABSTRACT:
A magnetoresistive head is composed of a soft magnetic layer formed on a substrate, a magnetic isolation layer formed on the soft magnetic layer, a magnetoresistive layer formed on the magnetic isolation layer, and a magnetic domain controlling magnetic layer, which is made of an anti-ferromagnetic layer or a hard ferromagnetic layer having a magnetically nonactive thickness, for covering a sense region of the magnetoresistive layer. Accordingly, because the magnetic domain controlling magnetic layer grows on the magnetoresistive layer in succession to the growth of the magnetoresistive layer, there is no probability that a natural oxide is produced in a boundary region between the magnetoresistive layer and the magnetic domain controlling magnetic layer. Also, there is no probability that a film thickness of the magnetoresistive layer placed under the magnetic domain controlling magnetic layer changes. Therefore, an exchange coupling magnetic field of the magnetic domain controlling magnetic layer for the magnetoresistive layer can be stabilized, a Barkhausen noise can be suppressed, and a superior magnetoresistive effect characteristic can be stably obtained.
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Fujitsu Limited
Klimowicz William J.
Levy Stuart S.
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