‘Thermal spring’ magnetic recording media for...

Details ‘Thermal spring’ magnetic recording media for... ‘Thermal spring’ magnetic recording media for...

2005-04-19

2005-04-19

Bernatz, Kevin M. (Department: 1773)

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

C428S637000, C428S668000, C428S678000, C428S686000, C428S065100, C428S212000, C428S216000, C428S336000, C428S690000, C360S131000

Reexamination Certificate

active

06881497

ABSTRACT:
A thermal spring magnetic medium is provided having first and second stacks providing two exchange coupled ferromagnetic layers having different Curie temperatures. The first stack has a high magneto-crystalline anisotropy, a relatively low saturation magnetization and a low Curie temperature. The second stack has a relatively low magneto-crystalline anisotropy, a high saturation magnetization and a high Curie temperature. Preferably the first stack includes an alloy of Fe—Pt or Co—Pt, and the second stack includes an allow of Co—Pt or Co—Pd. A disk drive system having the novel medium is also provided.

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