Title :
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
fDate :
9/1/2000 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
