An analysis of a shielded magnetic pole for perpendicular recording

Author

Wilton, David T. ; Mapps, Desmond J.

Author_Institution

Sch. of Math. and Stat., Plymouth Univ., UK

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

4182

Lastpage

4193

Abstract

The new solution of an idealized mathematical model of the field due to a symmetrically shielded magnetic pole suitable for perpendicular recording is presented. Accurate Fourier coefficients and corresponding magnetic fields are obtained for a representative pole dimension and a range of pole/shield separation distances, and comparisons are made with the field of an unshielded isolated pole. It is found that the presence of a shield may significantly increase both the peak field strength and the field gradient. The highest field gradients presented are predicted for in-contact recording with certain thin-film pole/shield geometries

Keywords

Fourier analysis; magnetic heads; magnetic recording; magnetic shielding; Fourier coefficients; field gradient; idealized mathematical model; perpendicular recording; pole/shield separation distances; shielded magnetic pole; Magnetic analysis; Magnetic cores; Magnetic field measurement; Magnetic films; Magnetic heads; Magnetic separation; Magnetic shielding; Magnetostatics; Mathematical model; Perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.280864

Filename

280864