Perpendicular Recording Media Imaging Using Dynamic Read-Back Microscopy

Author

Chekanov, Albert S. ; Abarra, E. Noel ; Choe, Gunn

Author_Institution

Western Digital Corp., Fremont, CA

Volume

42

Issue

10

fYear

2006

Firstpage

2345

Lastpage

2347

Abstract

Magnetic patterns on perpendicular recording media were imaged by spin-stand level dynamic read-back microscopy. High-density tracks are clearly resolved up to 1000 kfci and details of magnetic bit structure, not usually observable using standard read-write tests, are readily observed. Encroachment of tracks on Co-Cr-Pt-O media with low oxygen content and low-coercivity results in a nonuniform erasure; as-written rectangular bits become trapezoidal in shape. Media with high oxygen content and high coercivity provide superior side erasure resistance

Keywords

chromium; cobalt; coercive force; magnetic heads; microscopy; oxygen; perpendicular magnetic recording; platinum; CoCrPtO; dynamic read-back microscopy; high-density tracks; magnetic bit structure; magnetic patterns; nonuniform erasure; perpendicular recording media imaging; standard read-write tests; superior side erasure resistance; Gunn devices; High-resolution imaging; Image resolution; Magnetic force microscopy; Magnetic heads; Magnetic shielding; Magnetoresistance; Perpendicular magnetic recording; Shape; Testing; Co-Cr-Pt-O media; magnetic imaging; microscopy; perpendicular magnetic recording (PMR); side erasure;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.878691

Filename

1704294