Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1985-08-15
1987-05-05
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 530
Patent
active
046636854
ABSTRACT:
A magnetoresistive (MR) read transducer assembly in which the thin film MR layer is longitudinally biased only in the end regions by exchange bias developed by a thin film of antiferromagnetic material that is deposited in direct contact with the MR layer in the end regions. The longitudinal bias is of a level sufficient to maintain the end regions of the MR layer in a single domain state and thereby induce a single domain state in the central region of the MR layer. Transverse bias is produced within the central region of the MR layer of a level sufficient to maintain that region of the MR layer in a linear response mode. Spaced conductive elements are connected to the MR layer within the central region to define a detection region so that signal output means connected to the conductive elements can determine the resistance changes in the detection region of the MR layer as a function of the fields which are intercepted by the MR layer.
REFERENCES:
patent: 3864751 (1975-06-01), Beaulieu et al.
patent: 3887944 (1975-06-01), Bajorek
patent: 4103315 (1977-06-01), Hempstead et al.
patent: 4535375 (1983-01-01), Mowry et al.
International Business Machines
Schmid, Jr. Otto
Tupper Robert S.
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