Title :
Development of high resolution and low noise single-layered perpendicular recording media for high density recording
Author :
Hirayama, Y. ; Futamoto, M. ; Ito, K. ; Honda, Y. ; Maruyama, Y.
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
1/1/1997 12:00:00 AM
Abstract :
Single-layered perpendicular recording media with high resolution and low noise characteristics, which can be used for 10 Gb/in2 level magnetic recording, have been developed. Noise characteristics of highly oriented CoCr19Pt10 media are improved, by employing CoCr35/TiCr10 dual-underlayer, by reducing magnetic crystal grain diameter, and by adding Ta to the magnetic layer. A linear recording density resolution (D50) value of 260 kFCI and a S0/N ratio of 36 dB are confirmed for the low noise 50-nm-thick CoCr19Pt10 Ta2 dual-underlayer medium using a flying MR head at magnetic spacing of 40 nm
Keywords :
chromium alloys; cobalt alloys; digital magnetic recording; grain size; hard discs; magnetic multilayers; magnetic recording noise; perpendicular magnetic recording; platinum alloys; soft magnetic materials; tantalum alloys; 36 dB; 40 nm; 50 nm; CoCr19Pt10Ta2 medium; CoCr19Pt10Ta2-CoCr35 -TiCr10; CoCr35/TiCr10 dual-underlayer; flying MR head; hard disc storage; high density recording; high resolution recording media; low noise characteristics; magnetic crystal grain diameter reduction; single-layered perpendicular recording media; Magnetic anisotropy; Magnetic heads; Magnetic noise; Magnetic recording; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Scanning electron microscopy; Sputtering; Substrates; Writing;
Journal_Title :
Magnetics, IEEE Transactions on
