Magnetic Isolation for Hf–capped CoPtCr–SiO2 Perpendicular Media by Postannealing

Effect of post-annealing on magnetic properties for Hf–capped CoPtCr–SiO2 perpendicular granular recording media was investigated. It was found that Hf diffusion improved magnetic isolation among magnetic grains of the post-annealed media. Detailed analysis revealed that; non-magnetic layer was form...

Full description

Saved in:
Bibliographic Details
Main Authors: Hinata, S, Saito, S, Takahashi, M
Format: Conference Proceeding
Language:English
Subjects:
Annealing
Ferromagnetism
Grain boundaries
Interdiffusion
Magnetic anisotropy
Magnetic properties
Magnetic saturation
Magnetic storage
Physics
Recording instruments
Silicon dioxide
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Effect of post-annealing on magnetic properties for Hf–capped CoPtCr–SiO2 perpendicular granular recording media was investigated. It was found that Hf diffusion improved magnetic isolation among magnetic grains of the post-annealed media. Detailed analysis revealed that; non-magnetic layer was formed after post-annealing by interdiffusion of Hf and magnetic grains, retaining saturation magnetization and uniaxial magnetic anisotropy of a columnar part. The results suggest that capped Hf reacted with ferromagnetic Co into non-magnetic CoHf compound at the boundaries of the columns by diffusing through Si-O rich grain boundary.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/266/1/012057