Tilted media for hard disk drives and magnetic data storage...

Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media

Reexamination Certificate

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C428S828000

Reexamination Certificate

active

07144640

ABSTRACT:
A digital storage medium for use in data storage devices has two magnetic layers where the respective easy axes of the magnetic moments in the two layers are perpendicular to each other. Exchange coupling of the magnetic moments in the magnetic layers produces a resultant magnetic moment that is tilted out of the plane of the digital storage medium. The resultant magnetic moment of the medium allows the use of either a ring head, a single pole head, or a head that generates a field tilted at an angle for write operations.

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Wang, et al., “Approaches to Tilted Magnetic Recording for Extremely High Areal Density” IEEE Transactions on Magnetics, Jul. 2003, vol. 39, Issue 4, Part 1, pp. 1930-1935.
Matsubara, et al., “Magnetization Behavior In Exchange-Coupled Co/TbFeCo Films”, IEEE Transactions on Magnetics, Sep. 1990, vol. 26, Issue 5, pp. 1906-1908.

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