Title :
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
fDate :
9/1/2000 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
