Title :
Extremely high linear density recording by perpendicular magnetization
Author :
Honda, N. ; Ouchi, K. ; Iwasaki, S.
Author_Institution :
Akita Res. Inst. of Adv. Technol., Japan
fDate :
9/1/1996 12:00:00 AM
Abstract :
High output and high linear density recording of 300 kFRPI was obtained utilizing composite perpendicular media based on Co-Cr system alloy. It was found that the medium thickness exhibited a significant effect on the output. Higher output and lower noise were also obtained for media with higher Cr content. This may be related to the decrease in the magnetic domain size in the media. Finally, a high linear density signal of more than 1000 kFRPI was detected and an ultrahigh areal density recording of 29.6 Gbit/in2 was observed by MFM for a Co-Cr composite medium with thickness of 50 nm
Keywords :
chromium alloys; cobalt alloys; coercive force; magnetic domains; magnetic force microscopy; magnetic heads; magnetic recording noise; magnetic thin films; perpendicular magnetic recording; sputtered coatings; 40 to 100 nm; Co-Cr system alloy; CoCr16Nb4; CoCr16Pt4; CoCr16Ta4; CoCr19; CoCr22; Cr content; DC magnetron sputtering; MFM; coercivity; composite perpendicular media; extremely high linear density recording; high linear density signal; high output; magnetic domain size; medium thickness dependence; noise; perpendicular magnetization; recording density; single pole type heads; ultrahigh areal density recording; Chromium; Coercive force; Disk recording; Magnetic domains; Magnetic force microscopy; Magnetic heads; Magnetic noise; Magnetic recording; Magnetization; Perpendicular magnetic recording;
Journal_Title :
Magnetics, IEEE Transactions on
