Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 47, Issue 1, Pages 11-17Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2010.2078802
Keywords
Bit patterned media; inclined anisotropy; shielded planar head; write margin
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Bit patterned media with inclined anisotropy were proposed along with media design with a higher saturation magnetization and a small thickness for the dot. Inclination of the anisotropy axis was found to reduce broadened switching field distribution of the media caused by the magnetostatic interaction between the dots. Recording simulation at an areal density of 2.6 Tbit/in(2) using a write field of a shielded planar head exhibited substantially increased write shift margins of 6.5 nm and 10 nm in down-and cross track directions, respectively, for the media with inclined anisotropy when the anisotropy dispersion of the media was as small as 2%. Recording density was expected to be increased beyond 4 Tbit/in(2) for the media with additional exchange coupling between the dots.
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