Static information storage and retrieval – Read only systems – Magnetic
Patent
1995-02-21
1996-07-30
Nelms, David C.
Static information storage and retrieval
Read only systems
Magnetic
365100, 365173, G11C 1702
Patent
active
055418686
ABSTRACT:
A memory element has a sandwich structure in which rings of ferromagnetic material are spaced apart by a layer of a non-magnetic conductor (which is also typically a ring). These ferromagnetic rings will have differing magnetic hardness. At least one ring will be magnetically hard or antiferromagnetically-pinned. At least one other ring will be magnetically softer than the hard or antiferromagnetically-pinned ring. The non-magnetic conductor is at least thick enough to prevent essentially all exchange coupling between the ferromagnetic rings. Conducting leads provide current to pass through the ferromagnetic rings, perpendicular to magnetic moments in the ferromagnetic rings.
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Hoang Huan
Karasek John J.
McDonnell Thomas E.
Nelms David C.
The United States of America as represented by the Secretary of
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