Tilted media in a perpendicular recording system for high areal density recording

Zou, Y. Y.; Wang, J. P.; Hee, C. H.; Chong, T. C.
April 2003
Applied Physics Letters;4/14/2003, Vol. 82 Issue 15, p2473
Academic Journal
To overcome the high sensitivity of the signal-to-noise ratio (SNR) to the switching field distribution in the perpendicular media, we proposed to use tilted media in the perpendicular recording system in this letter. It was found that a much better tolerance of the easy-axis distribution could be achieved when tilted media were used instead of perpendicular media in a perpendicular recording system. We then analyzed the range of the switching field at the freezing points, and found that high K[sub u] magnetic material is feasible in tilted media. The results indicated that the areal density could be more than 62% higher than that of perpendicular media when 45° easy-axis tilted media with K[sub u] = 7.0 × 10[sup 6] erg/cm³ were used. Finally, simulation of the switching dynamics revealed that a much faster magnetization switching could be achieved in 45°-tilted media than in perpendicular media.


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