Playback pulse shape and spectra for shielded MR heads

Author

Zhang, Yun ; Shtrikman, S. ; Bertram, H. Neal

Author_Institution

Dept. of Phys., California Univ., San Diego, La Jolla, CA, USA

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1093

Lastpage

1103

Abstract

Simple analytical expressions for the longitudinal surface fields from four types of shielded magnetoresistive (MR) heads, i.e., single element MR heads (both centered and off-center), dual-stripe heads, and “differential” MR heads are derived using superposition and Schwarz-Christoffel transformation. These expressions are utilized to study playback pulse shape and spectra. For the centered shielded MR head as well as the dual stripe shielded MR head, simple accurate formulas for PW₅₀ and D₅₀ are derived. For the dual stripe MR head, the model predicts the position of the first spectral gap null accurately, as well as the voltage spectral shape

Keywords

magnetic heads; magnetic recording; magnetic sensors; magnetic shielding; magnetoresistive devices; D₅₀; PW₅₀; Schwarz-Christoffel transformation; centered heads; differential MR heads; dual-stripe heads; first spectral gap null; high density magnetic recording; longitudinal surface fields; off-center heads; playback pulse shape; shielded MR heads; shielded magnetoresistive heads; simple accurate formulas; simple analytical expressions; single element MR heads; spectra; superposition; voltage spectral shape; Fourier series; Magnetic analysis; Magnetic heads; Magnetic recording; Magnetic sensors; Magnetoresistance; Predictive models; Pulse shaping methods; Spectral shape; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.558532

Filename

558532