High performance CoPtCrO single layered perpendicular media with no recording demagnetization

Author

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

Author_Institution

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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2393

Lastpage

2395

Abstract

High coercivity CoPtCrO single layered perpendicular medium has been newly developed in order to solve the recording demagnetization problem, and exhibited the excellent recording characteristics with ring type head; the areal recording density being higher than 11 Gbit/inch ². The high Pt content and the segregation structure with thick oxygen-rich boundaries led this perpendicular medium to high coercivity, steep hysteresis slope at Hc, and high squareness at the same time. These features were found to be primary factors for both high SNR and suppressed recording demagnetization

Keywords

chromium alloys; cobalt alloys; coercive force; demagnetisation; magnetic hysteresis; magnetic recording noise; perpendicular magnetic recording; platinum alloys; segregation; CoPtCrO; Pt content; SNR; areal recording density; high coercivity; high performance CoPtCrO single layered perpendicular media; high squareness; recording characteristics; recording demagnetization problem; ring type head; segregation structure; steep hysteresis slope; suppressed recording demagnetization; thick oxygen-rich boundaries; Coercive force; Demagnetization; Hysteresis; Magnetic anisotropy; Magnetic flux; Magnetic heads; Memory; Perpendicular magnetic anisotropy; Sputtering; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908443

Filename

908443