Development of Co-alloys for perpendicular magnetic recording media

Author

Bin Lu ; Weller, D. ; Ganping Ju ; Sunder, A. ; Xiaowei Wu

Author_Institution

Seagate Technol., Pittsburgh, PA, USA

fYear

2003

fDate

6-8 Jan. 2003

Firstpage

46

Abstract

The objective of Co-alloy perpendicular media (PM) development is to achieve thermally stable media with enhanced SNR. This in turn requires advanced microstructural features and magnetic properties, such as excellent (00.2) orientation, narrow grain size distribution and small grain size, low fcc phase content and stacking faults (SFs), good chemical segregation at grain boundaries, high anisotropy (K/sub u/), high coercivity (H/sub c/), high negative nucleation field (H/sub n/), full squareness (S=M/sub T//M/sub S/) and optimized inter-granular exchange interaction. In this paper we discuss these important issues in the development of Co-alloy perpendicular media.

Keywords

cobalt alloys; coercive force; grain boundaries; grain boundary segregation; grain size; magnetic hysteresis; perpendicular magnetic anisotropy; perpendicular magnetic recording; stacking faults; thermal stability; Co-Cr-Pt; Co-Cr-Pt-B; Co-alloy PM; CoCrPt; CoCrPtB; SNR enhancement; anisotropy; coercivity; fcc phase content; grain boundary chemical segregation; grain size distribution; inter-granular exchange interaction optimization; media microstructural features/magnetic properties; media orientation; media thermal stability; negative nucleation fields; perpendicular magnetic recording media; squareness; stacking faults; Anisotropic magnetoresistance; Chemicals; Grain boundaries; Grain size; Magnetic hysteresis; Magnetic properties; Magnetic recording; Perpendicular magnetic recording; Soft magnetic materials; Stacking;

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.2003.1177050

Filename

1177050