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

fYear

2003

fDate

6-8 Jan. 2003

Firstpage

18

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-7746-X

Type

conf

DOI

10.1109/NAPMRC.2003.1177022

Filename

1177022