Extremely high linear density recording by perpendicular magnetization

Author

Honda, N. ; Ouchi, K. ; Iwasaki, S.

Author_Institution

Akita Res. Inst. of Adv. Technol., Japan

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3804

Lastpage

3806

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538840

Filename

538840