Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1995-03-10
1998-10-27
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 5127
Patent
active
058285253
ABSTRACT:
A GMR element part is formed of a laminated structure which comprises at least one pair of ferromagnetic layers and a nonmagnetic intermediate layer interposed between the pair of ferromagnetic layers. Signal magnetic field detecting ferromagnetic layers will be optionally disposed one each outside the pair of ferromagnetic layers. The GMR element part consists of a laminated structure which is provided with one pair of GMR ferromagnetic layers opposed to each other across a nonmagnetic intermediate layer or a laminated structure which is provided with one pair of GMR ferromagnetic layer opposed to each other across a nonmagnetic intermediate layer and at least one low-permeability ferromagnetic layer disposed there between through the medium of a nonmagnetic intermediate layer. The GMR element part functions as a read head for sensing the resistance which is varied when signal magnetic fields of mutual opposite directions are applied to the pair of GMR ferromagnetic layers and displaying a differential detection type output response. A granular type ferromagnetic intermediate layer will be used as the GMR element part.
REFERENCES:
patent: 3860965 (1975-01-01), Voegeli
patent: 5287238 (1994-02-01), Baumgart et al.
patent: 5442508 (1995-08-01), Smith
patent: 5476680 (1995-12-01), Coffey et al.
patent: 5514452 (1996-05-01), Araki et al.
"Dual Magnetoresistive Head for Very High Density Recording", Smith et al., IEEE Transactions on Magnetics, 28(5):2292-2294 (1992).
Akiyama Junichi
Fuke Hiromi
Funayama Tomomi
Hashimoto Susumu
Iwasaki Hitoshi
Davis David D.
Kabushiki Kaisha Toshiba
Levy Stuart S.
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