Even harmonic ripple effect and demagnetizing field mapping

Author

Xian, Rui ; Yuan, Zhi-Min ; Xiao, Pei-Ying ; Liu, Bo

Author_Institution

Data Storage Inst., Singapore, Singapore

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2601

Lastpage

2603

Abstract

A new phenomenon in data writing process, named "even harmonic ripple effect," has been reported and investigated in this paper. The analysis and simulation results show that this effect is due to the interpattern proximity effect on the hard transition shifts when a data pattern formed by square wave writing current at a frequency (2n+p)f is overwritten by another square wave writing current at a frequency f, where n is an integer and p is an introduced shift rate. The ripple effect can be used to measure the amount of demagnetizing field fluctuation of magnetic media in magnetic recording system.

Keywords

demagnetisation; magnetic recording; data writing process; demagnetizing field fluctuation; demagnetizing field mapping; even harmonic ripple effect; hard transition shifts; interpattern proximity effect; magnetic media; magnetic recording system; overwriting; square wave writing current; Analytical models; Demagnetization; Fluctuations; Frequency; Grain size; Magnetic field measurement; Magnetic recording; Pattern analysis; Proximity effect; Writing; Even harmonic ripple effect; hard transition shift; interpattern proximity effect;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.832107

Filename

1325581