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Write Field Dynamics in the Presence of Antiferromagnetic Coupling of Writer Pole.

Authors :
Li, Zhanjie
Bai, Daniel Z.
Pan, Tao
Han, Dehua
Liu, Feng
Li, Shaoping
Yuan, Samuel
Source :
IEEE Transactions on Magnetics. Jul2013, Vol. 49 Issue 7, p3725-3728. 4p.
Publication Year :
2013

Abstract

A micromagnetic simulation is conducted to study the write field dynamics in the presence of antiferromagnetic exchange coupling (AFC) of writer pole for a perpendicular magnetic recording (PMR) writer head. It is found that, depending on the actual configuration of the AFC coupling in the yoke and the pole tip, there could be an intermediate transient state near zero write field during the magnetization reversal, compared to the normal writer design without AFC coupling. This transient state may cause recording performance degradation. We further investigated the AFC coupling effect on the remanent field in the degauss process. For different performance aspects, i.e., field dynamics, maximum field, and remanent field, the AFC in the yoke and in the pole tip plays different roles. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00189464
Volume :
49
Issue :
7
Database :
Academic Search Index
Journal :
IEEE Transactions on Magnetics
Publication Type :
Academic Journal
Accession number :
89227900
Full Text :
https://doi.org/10.1109/TMAG.2012.2236544