Preparation of double-layered perpendicular media for fine magnetic structure

Author

Ariake, Jun ; Honda, Naoki ; Ouchi, Kazuhiro ; Iwasaki, Shun-ichi

Author_Institution

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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2411

Lastpage

2413

Abstract

Two preparation methods for sputter deposition are examined in order to obtain a low noise double-layered layered perpendicular recording medium. Very thin intermediate layers between the recording layer and the soft magnetic backlayer was found to reduce the medium noise. Nitrogen addition to the NiFe system backlayer was also effective in reducing the noise. The medium noise reduction was attributed to the reduction in grain size and a magnetic domain size of the recording layer in both cases. An MFM image corresponding to a density beyond 50 Gbit/in² was observed for a medium with Co-Zr-Nb intermediate layer

Keywords

chromium alloys; cobalt alloys; grain size; magnetic domains; magnetic film stores; magnetic force microscopy; magnetic recording noise; magnetic thin films; niobium alloys; perpendicular magnetic recording; platinum alloys; sputter deposition; CoCrNbPt; MFM image; N addition; double-layered perpendicular media; fine magnetic structure; grain size; magnetic domain size; noise reduction; soft magnetic backlayer; sputter deposition; thin intermediate layers; Grain size; Magnetic domains; Magnetic force microscopy; Magnetic noise; Magnetic recording; Nitrogen; Noise reduction; Perpendicular magnetic recording; Soft magnetic materials; Sputtering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908449

Filename

908449