Affects of skew angle on the written-in base line shift (BLS) signal at high track densities

Author

Chang, Thomas ; Salo, Mike ; Fang, Hao ; Madison, Mike ; Zhu, Jian-Gang ; Arnoldussen, Tom

Author_Institution

IBM Corp., San Jose, CA, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3395

Lastpage

3397

Abstract

The track edge charge distribution responsible for the base line shift (BLS) in the MR readback waveform is studied through skew angle measurements. A model based on a finite element head field calculation and micromagnetic simulation is utilized to understand the track edge charge formation responsible for the BLS signal. The modeling results show that the spatial distribution of the dipole charge profile in the cross track direction becomes asymmetric when transitions are written at skew angles. This explains the observed asymmetry in the measured base line shift profile

Keywords

finite element analysis; magnetic heads; magnetoresistive devices; MR readback waveform; dipole charge profile; finite element model; magnetoresistive head; micromagnetic simulation; skew angle; track density; track edge charge distribution; written-in base line shift signal; Charge measurement; Current measurement; Finite element methods; Frequency; Goniometers; Magnetic field measurement; Magnetic heads; Magnetoresistance; Micromagnetics; Position measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538635

Filename

538635