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

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-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 45degrees easy-axis tilted media with K-u=7.0x10(6) erg/cm(3) were used. Finally, simulation of the switching dynamics revealed that a much faster magnetization switching could be achieved in 45degrees-tilted media than in perpendicular media. (C) 2003 American Institute of Physics.