Title :
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
fDate :
11/1/1993 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
