DocumentCode
1483292
Title
Shield-related side reading in MR heads
Author
Shi, Xizeng ; Ju, Kochan
Author_Institution
Headway Technologies, Milpitas, CA, USA
Volume
33
Issue
5
fYear
1997
fDate
9/1/1997 12:00:00 AM
Firstpage
2899
Lastpage
2901
Abstract
Shield-related side reading of recorded data tracks by shielded MR heads is investigated. This phenomenon is caused by the magnetic coupling between the shields and MR elements. Changes in the magnetic states in the shields can either make the side reading appear or disappear. The linear density of the recorded pattern has a strong effect on the degree of the phenomenon. In reading the synchronization patterns in the servo field of a hard disk drive, this kind of MR head can produce a read-back signal with severe distortion, causing the drive to malfunction. Improved shield structure can significantly reduce this side reading
Keywords
hard discs; magnetic heads; magnetic shielding; magnetoresistive devices; synchronisation; distortion; hard disk drive; linear density; magnetic coupling; magnetic states; read-back signal; recorded data tracks; servo field; shield-related side reading; shielded MR heads; synchronization patterns; Couplings; Disk drives; Distortion; Drives; Hard disks; Magnetic heads; Magnetic shielding; Servomechanisms; Testing; Transducers; Writing;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.617791
Filename
617791
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