Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1995-07-17
1999-04-27
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 539
Patent
active
058985468
ABSTRACT:
The present invention relates to a magnetoresistive head capable of converting a change in a magnetic field generated by a magnetic recording medium into a change in electric resistivity by utilizing spin valve magnetoresistance effect to read signal information. The magnetoresistive head comprises a first magnetic layer, a second magnetic layer formed on the first magnetic layer through a first nonmagnetic metal layer and magnetized in one direction, a third magnetic layer formed on the second magnetic layer through a second nonmagnetic metal layer, and an electric current supplying layer for applying a constant current to at least the third magnetic layer, the second nonmagnetic metal layer and the second magnetic layer in one of the same direction as and the opposite direction to the direction of magnetization of the second magnetic layer.
REFERENCES:
patent: 4949039 (1990-08-01), Gruberg
patent: 5134533 (1992-07-01), Friedich et al.
patent: 5155642 (1992-10-01), Voegeli
patent: 5206590 (1993-04-01), Dieny et al.
Aoshima Ken-ichi
Kanai Hitoshi
Kane Junichi
Mizoshita Yoshifumi
Davis David D.
Fujitsu Limited
Heinz A. J.
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