Measurement of transition shape, width, and total magnetic spacing

Author

Mallary, Michael L. ; Beauregard, Roger ; Benakli, Mourad ; Torabi, Adam F. ; Marshall, Steven B.

Author_Institution

Maxtor Corp., Shrewsbury, MA, USA

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2567

Lastpage

2569

Abstract

Measurement of the harmonics of low-frequency all-ones patterns and the shield-to-shield read gap are used here to reconstruct the spacing, the isolated transition shape, and the width parameter for longitudinal recording. For perpendicular, the media thickness parameters and data at two spacings are needed to accurately determine the spacing and width parameter. The -90% to +90% transition shapes fits well to a tanh(x/a) shape for longitudinal and perpendicular recording.

Keywords

magnetic recording; magnetic transitions; magnetic variables measurement; all-ones patterns; harmonics measurement; hyperbolic tangent; longitudinal recording; magnetic spacing; magnetic transition; media thickness parameters; perpendicular recording; shield-to-shield read gap; spacing reconstruction; transition shape; transition width; Frequency; Helium; Magnetic flux; Magnetic heads; Magnetic noise; Magnetic recording; Magnetic shielding; Measurement errors; Perpendicular magnetic recording; Shape measurement; Hyperbolic tangent; transition shape; transition width;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.832469

Filename

1325570