Title :
Multilayered soft magnetic underlayers for perpendicular magnetic recording media
Author :
Nakagawa, S. ; Okamoto, T. ; Sok-hyun Kong
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan
Abstract :
The soft magnetic underlayer (SUL) with high saturation magnetization in perpendicular magnetic recording media have been required essentially to achieve high recording density with high bit stability. However, stripe domain configuration caused by the induced perpendicular magnetic anisotropy and deterioration of surface smoothness in thick SULs degrades the recording performance. In this study, multilayers, with several kinds of interlayers for the SUL, were prepared in order to improve the soft magnetic properties and surface smoothness as well as reduce the media noise originated from the domain configuration.
Keywords :
magnetic domains; magnetic multilayers; magnetic recording noise; perpendicular magnetic anisotropy; perpendicular magnetic recording; soft magnetic materials; surface topography; FeCoB-NiFeO; NiFe-Si; SUL interlayers; SUL saturation magnetization; SUL soft magnetic properties; bit stability; domain configuration media noise reduction; induced perpendicular magnetic anisotropy; magnetic multilayers; multilayered soft magnetic underlayers; perpendicular magnetic recording media; recording density; recording performance; stripe domain configuration; thick SUL surface smoothness deterioration; Degradation; Magnetic anisotropy; Magnetic domains; Magnetic multilayers; Magnetic properties; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Soft magnetic materials; Stability;
Conference_Titel :
Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-7746-X
DOI :
10.1109/NAPMRC.2003.1177022
