A theoretical study of nonlinear transition shift

Author

Zhang, Yun ; Bertram, H. Neal

Author_Institution

Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1955

Lastpage

1957

Abstract

An analytical formula is developed for calculating the magnetostatic field from a longitudinal magnetic transition with a hyperbolic tangent transition shape. This formula is utilized to study the dependence of nonlinear transition shift of a dibit pattern on recording parameters, such as flying height and recording bit density. It is found that at very low densities the nonlinear transition shift varies with bit length B as N(B)~1/B³. The power factor decreases with increasing density and it decreases faster for higher flying height. For practical recording densities, the power ~2. The relation N(B) is then used to determine the optimal write precompensation level theoretically

Keywords

error compensation; magnetic fields; magnetic recording; magnetic transitions; dibit pattern; flying height; hyperbolic tangent transition shape; longitudinal magnetic transition; magnetic recording parameters; magnetostatic field; nonlinear transition shift; optimal write precompensation level; power factor; recording bit density; Magnetic analysis; Magnetic heads; Magnetic recording; Magnetostatics; Micromagnetics; Nonlinear distortion; Pattern analysis; Reactive power; Shape; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706755

Filename

706755