Title :
Performance comparison between conventional and AFC media at different orientation ratios
Author :
Zhou, J.N. ; Acharya, B.R. ; Abarra, E.N. ; Choe, G. ; Gao, J. ; Johnson, K.E.
Author_Institution :
MMC Technol. Inc., San Jose, CA, USA
fDate :
7/1/2004 12:00:00 AM
Abstract :
Antiferromagnetically coupled (AFC) media and conventional media (CM) were compared side to side over a wide range of orientation ratios (OR). For both AFC and CM, oriented media outperform isotropic media. AFC and CM show similar signal-to-noise ratios (SNR) throughout the entire range of OR. CM exhibit good SNR performance even at Mrt<0.33 memu/cm2 but with unacceptable thermal decay. When the coercivity is increased to match that of AFC at Mrt<0.30 memu/cm2, the SNR of the CM deteriorates and the thermal stability is still worse than the AFC. AFC offers some advantages in SNR roll-off in the isotropic media but not in the highly oriented media.
Keywords :
antiferromagnetic materials; magnetic recording; thermal stability; AFC media; SNR performance; antiferromagnetically coupled media; coercivity; conventional media; highly oriented media; isotropic media; longitudinal media; magnetic recording; orientation ratios; performance comparison; signal-to-noise ratios; thermal decay; thermal stability; Automatic frequency control; Bit error rate; Chemicals; Chromium alloys; Coercive force; Ferrimagnetic materials; Magnetic recording; Signal to noise ratio; Temperature measurement; Thermal stability; AFC media; longitudinal media; magnetic recording; orientation ratio;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.829837
