Magnetic media with improved exchange coupling

Details Magnetic media with improved exchange coupling Magnetic media with improved exchange coupling

2006-07-04

2006-07-04

Bernatz, Kevin M. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S828100, C360S131000

Reexamination Certificate

active

07070870

ABSTRACT:
A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes anti ferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.

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