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

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2428

Lastpage

2430

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 M_rt<0.33 memu/cm² but with unacceptable thermal decay. When the coercivity is increased to match that of AFC at M_rt<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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.829837

Filename

1325527