Accession Number : ADD018080

Title :   Annular GMR-Based Memory Element.

Descriptive Note : Patent, Filed 21 Feb 95, patented 30 Jul 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Prinz, Gary A

Report Date : 30 Jul 1996

Pagination or Media Count : 12

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.

Descriptors :   *RANDOM ACCESS COMPUTER STORAGE, *FERROMAGNETIC MATERIALS, *SANDWICH CONSTRUCTION, *PATENTS, *MAGNETORESISTANCE, COUPLING(INTERACTION), MAGNETIC FIELDS, RINGS, EXCHANGE, HARDNESS, RIGHT ANGLES, MAGNETIC MOMENTS

Subject Categories : Properties of Metals and Alloys
      Computer Hardware
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE