Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1998-04-02
1999-11-02
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428694R, 428694T, 428694TS, 428694TM, 428900, 360113, 324252, G11B 566
Patent
active
059767138
ABSTRACT:
An exchange-coupling film has an antiferromagnetic film consisting of an antiferromagnetic alloy such as an RMn alloy or an RMnFe alloy (R is at least one kind of element selected from Ir, Rh, Pt, Au, Ag, Co, Pd, Ni, Cr, Ge, Ru and Cu) and a ferromagnetic film stacked with the antiferromagnetic film. The antiferromagnetic film is oriented in its plane. Further, the antiferromagnetic film has a large grain diameter of such as 5 nm or more. The antiferromagnetic film can be obtained by forming a film with an alloy target of which oxygen content is 1% by weight or less. An exchange-coupling film using such an antiferromagnetic film has exchange-coupling force enough large at room temperature and high temperature region together with excellent corrosion resistance or heat resistance. The exchange-coupling film is provided with an electrode for energizing an electric current to the ferromagnetic film and is used as, for example, a spin valve type magneto-resistance effect element.
REFERENCES:
patent: 4103315 (1978-07-01), Hempstead
patent: 5014147 (1991-05-01), Parkin et al.
patent: 5315468 (1994-05-01), Lin
patent: 5549978 (1996-08-01), Iwasako
Fuke Hiromi
Iwasaki Hitoshi
Nakamura Shin-ichi
Sahashi Masashi
Saito Kazuhiro
Kabushiki Kaisha Toshiba
Kiliman Leszek
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