Analytic and micromagnetic predictions of neighbor-induced transition shift

Author

Yoseph, Sissay G. ; Victora, R.H.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Minnesota, Minneapolis, MN, USA

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2561

Lastpage

2563

Abstract

An analytic formula to predict the bit transition shift due to the magnetostatic field generated by neighboring written tracks is derived. In order to test this theory, we have employed a micromagnetic simulation including recording head, soft underlayer and Voronoi cell-based recording layer. This neighbor-induced transition shift scales worse than linearly with the density of the recording medium, reaching ∼70% at 1 terabit/in² in worst case scenarios such as dc-erased media.

Keywords

magnetic heads; magnetostatics; micromagnetics; perpendicular magnetic recording; soft magnetic materials; Voronoi cell-based recording layer; bit transition shift prediction; dc-erased media; magnetostatic field generation; micromagnetic prediction; micromagnetic simulation; neighbor-induced transition shift; neighboring written tracks; perpendicular recording; recording head; recording medium; soft underlayer; Equations; Geometry; Magnetic analysis; Magnetic heads; Magnetic separation; Magnetostatics; Micromagnetics; Perpendicular magnetic recording; Saturation magnetization; Writing; Micromagnetics; NITS; neighbor-induced transition shift; perpendicular recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.828986

Filename

1325568