Signal and noise characteristics of Co/Pd multilayer perpendicular magnetic recording media are discussed based upon MFM analysis. The noise of the Co/Pd multilayer media is originated mainly from irregularities in the magnetic transition regions, and can be drastically suppressed by increasing the thickness of the carbon underlayer although a large number of reversed magnetic domains between the magnetic transitions still exist. The fine magnetic clusters formed in the medium with a thick carbon underlayer result in clear magnetic transition boundaries of recorded bits in the high recording density region. By examining the profile of the M-H loops, the decrement in the α value, which is defined as the slope of M-H loop at the value of coercivity, improves the signal to noise (S/N) ratio for the Co/Pd multilayer media.
|ジャーナル||Journal of Magnetism and Magnetic Materials|
|出版ステータス||Published - 2001 10 1|
|イベント||Proceedings of the 5th Perpendicular Magnetic Recording Conference (PMRC 2000) - Sendai, Japan|
継続期間: 2000 10 23 → 2000 10 26
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics