[Fe-Co/Si]/sub n/ multilayers with high saturation magnetization for backlayer of perpendicular magnetic recording media

[Fe-Co/Si]/sub n/ multilayers prepared using amorphous Si interlayers were investigated as soft magnetic underlayers for perpendicular magnetic recording media with large saturation magnetization 4/spl pi/M/sub s/. The addition of B into Fe-Co layers was examined to control the magnetic anisotropy field H/sub k/. The Si interlayers suppressed stripe domain configuration which causes media noise in [Fe-Co/Si]/sub n/ multilayers. The addition of B and the application of an external dc-field during the deposition of [Fe-Co-B/Si]/sub n/ effectively induced a large H/sub k/ in the multilayers.