Analytic study of the effects of shield recession on the replay characteristics of an idealized MR sensor

Author

Shute, Hazel A. ; Wilton, David T. ; Mapps, Desmond J.

Author_Institution

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

Volume

33

Issue

4

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

2543

Lastpage

2551

Abstract

A previously published two-dimensional conformal mapping solution for a shielded magnetoresistive (MR) sensor is used to explore the effect that recessing the shields has on replay from a vertically oriented medium in the presence of a soft magnetic underlayer. The horizontal and vertical head-field components, spectral response function, linear dibit shift, and roll-off curve of each of two heads, where the sensor tip and the shield faces are coplanar, are compared with those of the same heads with recessed shields. By recessing the shields, the solution may be applied to the case of an unshielded MR sensor

Keywords

digital magnetic recording; magnetic heads; magnetic sensors; magnetic shielding; magnetoresistive devices; head-field components; linear dibit shift; magnetoresistive sensor; replay characteristics; roll-off curve; shield recession; soft magnetic underlayer; spectral response function; two-dimensional conformal mapping; Ceramics; Magnetic analysis; Magnetic anisotropy; Magnetic heads; Magnetic sensors; Magnetic shielding; Magnetoresistance; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Soft magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.595914

Filename

595914