Title :
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
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;
Conference_Titel :
Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-7746-X
DOI :
10.1109/NAPMRC.2003.1177050
