Title :
[Fe-Co/Si]n multilayers with high saturation magnetization for backlayer of perpendicular magnetic recording media
Author :
Kong, S.H. ; Okamoto, T. ; Nakagawa, S.
Author_Institution :
Tokyo Inst. of Technol., Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
[Fe-Co/Si]n multilayers prepared using amorphous Si interlayers were investigated as soft magnetic underlayers for perpendicular magnetic recording media with large saturation magnetization 4πMs. The addition of B into Fe-Co layers was examined to control the magnetic anisotropy field Hk. The Si interlayers suppressed stripe domain configuration which causes media noise in [Fe-Co/Si]n multilayers. The addition of B and the application of an external dc-field during the deposition of [Fe-Co-B/Si]n effectively induced a large Hk in the multilayers.
Keywords :
cobalt alloys; coercive force; iron alloys; magnetic domains; magnetic hysteresis; magnetic multilayers; magnetic recording noise; magnetisation; perpendicular magnetic anisotropy; perpendicular magnetic recording; silicon; soft magnetic materials; sputter deposition; B addition; FeCo-Si; FeCoB-Si; [Fe-Co/Si]n multilayers; amorphous Si interlayer; backlayer; coercivity; double-layered media; external dc-field; facing targets sputtering method; high saturation magnetization; hysteresis loop; large saturation magnetization; magnetic anisotropy field control; magnetization loops; media noise; perpendicular magnetic recording media; soft magnetic underlayer; stripe domain configuration suppression; Amorphous magnetic materials; Amorphous materials; Magnetic anisotropy; Magnetic domains; Magnetic multilayers; Magnetic noise; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801800
