Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1980-06-09
1982-10-26
Kilgore, Robert M.
Dynamic magnetic information storage or retrieval
Head
Hall effect
365158, G11B 512, G11C 1100, G11B 530
Patent
active
043565239
ABSTRACT:
Two closely spaced magnetostatically coupled magnetoresistive elements are arranged with their respective planar surfaces in parallel. A nonmagnetic insulating material is interposed between the elements to prevent exchange coupling. Sense current flows simultaneously through both elements in the same direction and in perpendicular to the easy axis of magnetization. In response to signal fields applied in parallel with the sense current flow demagnetization components in the easy axis direction cancel. The output signal of the transducer is independent of recording track width and free of Barkhausen noise.
REFERENCES:
patent: 3493694 (1970-02-01), Hunt
patent: 3860965 (1975-01-01), Voegeli
patent: 3879760 (1975-04-01), Lazzari
patent: 3921217 (1975-11-01), Thompson
patent: 3921218 (1975-11-01), Kayser
patent: 4071868 (1978-01-01), Kaminaka et al.
patent: 4141051 (1979-02-01), Kuisk
patent: 4150408 (1979-04-01), Koel et al.
patent: 4277808 (1981-07-01), Nagaki
patent: 4280158 (1981-07-01), de Niet
"Magnetoresistive Transducer with Canted Easy Axis", by F. J. Jeffers, Spin Physics, IEEE Trans. Mag., vol. MAG-15, Nov. 1979, pp. 1628-1630.
Ampex Corporation
Clay Robert G.
Kilgore Robert M.
Strnad Elizabeth E.
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