Low cost anti-parallel pinned spin valve (SV) and magnetic...

Details Low cost anti-parallel pinned spin valve (SV) and magnetic... Low cost anti-parallel pinned spin valve (SV) and magnetic...

2005-04-19

2005-04-19

Evans, Jefferson (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324120

Reexamination Certificate

active

06882510

ABSTRACT:
The invention is a laminated antiferromagnetically coupled (AFC) structure for use in a spin valve (SV) sensor or magnetic tunnel junction (MTJ) device, having two ferromagnetic films coupled together with an improved AFC film. Particularly the AFC film comprises an alloy material selected from the group consisting of Ru100-xmx, Os100-ymy, Ir100-ymy, Rh100-y,my, Re100-zmz, and M100-xmx, where M is an alloy of two or more materials selected from the group consisting of Ru, Os, Ir, Rh, and Re, and where m is a material selected from the group consisting of W, Ta, Mo, Nb and alloys of two or more materials selected from W, Ta, Mo, and Nb, and where x is between approximately 5 and 95 at. %, y is between approximately 10 and 90 at. %, and z is between approximately 25 and 75 at. %. The sensors may be used in magnetic heads of hard disk drives.

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patent: 6689497 (2004-02-01), Girt

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