Magnetic device with improved antiferromagnetically coupling...

Details Magnetic device with improved antiferromagnetically coupling... Magnetic device with improved antiferromagnetically coupling...

2005-05-17

2005-05-17

La Villa, Michael (Department: 1775)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S678000, C428S213000, C428S693100, C365S158000, C360S313000, C360S324100, C360S324200

Reexamination Certificate

active

06893741

ABSTRACT:
The invention is a magnetic device, i.e., a magnetoresistive sensor or a magnetic tunnel junction device, that has a ferromagnetic structure of two ferromagnetic layers antiferromagnetically coupling together with an improved antiferromagnetically coupling (AFC) film. The AFC film is an alloy of Ru100-xFexwhere x is between approximately 10 and 60 atomic percent. This AFC film increases the exchange coupling by up to a factor or two and has an hcp crystalline structure making it compatible with Co alloy ferromagnetic layers.

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