Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1996-09-18
1998-06-16
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Hall effect
G11B 539
Patent
active
057680671
ABSTRACT:
A magnetoresistive head including a magnetoresistive film formed in a read-track region, and antiferromagnetic and ferromagnetic films are formed on each end of the magnetoresistive film outside of the read-track region such that bias magnetization is applied to the magnetoresistive film by exchange coupling between the antiferromagnetic film and the ferromagnetic film. A nonmagnetic intermediate film is formed between the ferromagnetic film and the magnetoresistive film for preventing ferromagnetic coupling on a contact boundary surface between the ferromagnetic film and the magnetoresistive film. In accordance with another aspect, a magnetoresistive head includes an antiferromagnetic layer formed from an X--Mn alloy, where X is an element selected from the group consisting of Pt, Rh, Ru, Tr, and Pd. An interdiffusion layer is formed between the antiferromagnetic film and a ferromagnetic layer or a pinned magnetic layer by heat treatment.
REFERENCES:
patent: 4809109 (1989-02-01), Howard et al.
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5285339 (1994-02-01), Chen
patent: 5315468 (1994-05-01), Lin et al.
Kuriyama Toshihiro
Saito Masamichi
Watanabe Toshinori
Alps Electric Co. ,Ltd.
Heinz A. J.
Shoup Guy W.
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