A new design to suppress recording demagnetization for perpendicular recording

Author

Takeo, Akihiko ; Oikawa, Soichi ; Hikosaka, Takashi ; Tanaka, Yoichiro

Author_Institution

Data Storage Dev. Center, Toshiba Corp., Tokyo, Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2378

Lastpage

2380

Abstract

Perpendicular recording is expected to be a high areal density recording system because of strong thermal stability potential and highly efficient writing process. However large demagnetizing fields in uniformly magnetized areas cause recording demagnetization and signal decrease with time. We propose a new recording design to suppress recording demagnetization for perpendicular magnetic recording, using high nucleation field media. A CoPtCrO perpendicular medium with high nucleation field successfully demonstrated the low noise performance. It shows less recording demagnetization and strong thermal stability. CoPtCrO perpendicular medium exhibited good BER performance with ring head recording

Keywords

chromium alloys; cobalt alloys; demagnetisation; ferromagnetic materials; magnetic recording noise; perpendicular magnetic recording; platinum alloys; thermal stability; BER performance; CoPtCrO; CoPtCrO perpendicular medium; demagnetizing fields; efficient writing process; high areal density recording system; high nucleation field media; low noise performance; new recording design; perpendicular magnetic recording; recording demagnetization suppression; ring head recording; signal decrease; strong thermal stability; uniformly magnetized areas; Demagnetization; Magnetic field measurement; Magnetic heads; Magnetic noise; Magnetic properties; Magnetization reversal; Perpendicular magnetic recording; Remanence; Soft magnetic materials; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908437

Filename

908437