Accurate approximation of fields and spectral response functions for perpendicular recording heads

Citation
Dt. Wilton et al., Accurate approximation of fields and spectral response functions for perpendicular recording heads, IEEE MAGNET, 35(4), 1999, pp. 2172-2179
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
00189464 → ACNP
Volume
35
Issue
4
Year of publication
1999
Pages
2172 - 2179
Database
ISI
SICI code
0018-9464(199907)35:4<2172:AAOFAS>2.0.ZU;2-S
Abstract
Solutions for the magnetic potential in rectangular regions with simple bou ndary conditions are used to approximate the two-dimensional potential in t he head face plane of a recording head. This method of approximation can be applied to any recording head with rectangular corners, in the presence of an underlayer, The slot approximation is demonstrated for ring heads and s hielded (magnetoresistive) pole heads. The quarter plane approximation is g iven for application to finite-length heads. Estimates of the field compone nts and the spectral response function are derived from the approximate pot ential. The simple slot approximation is shown to be at least as accurate a s other, often more complicated, methods of approximation, Most significant ly, both the slot and the quarter-plane approximations are easy to apply an d need no prior knowledge of the head field of the particular geometry unde r consideration.