Investigations of perpendicular write head design for 1 Tb/in/sup 2

We have revisited the considerations of perpendicular recording at 1 Tb/in/sup 2/. We have extensively modeled head designs with the down-track shield (DS) and head designs with the down-track and side shields (DS-SS). The side shields are needed to reduce the thermal erase width, however, there is...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 40; no. 1; pp. 319 - 325
Main Authors Batra, S., Hannay, J.D., Hong Zhou, Goldberg, J.S.
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2004
Subjects
Anisotropic magnetoresistance
Finite element methods
Heat-assisted magnetic recording
Jitter
Magnetic heads
Magnetic recording
Micromagnetics
Perpendicular magnetic recording
Signal to noise ratio
Thermal stability
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Summary:We have revisited the considerations of perpendicular recording at 1 Tb/in/sup 2/. We have extensively modeled head designs with the down-track shield (DS) and head designs with the down-track and side shields (DS-SS). The side shields are needed to reduce the thermal erase width, however, there is a substantial reduction in effective write field for the DS-SS heads compared to the DS heads. This reduction in effective write field defines an upper limit for the anisotropy of the medium that can be written. As a consequence, it is hard to simultaneously achieve writability and the thermal stability requirement for 1 Tb/in/sup 2/.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.821163