The effect of MR head geometry on playback pulse shape and spectra

Author

Champion, Eric ; Bertram, H. Neal

Author_Institution

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

Volume

31

Issue

4

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

2461

Lastpage

2470

Abstract

The playback properties and spectra of a shielded magnetoresistive head are examined utilizing a Fourier series method. Semi-analytic solutions are given for the magnetic scalar potential and spectra in terms of coefficients which have been numerically determined for common geometries. Voltage pulses are generated by convolving the potential with the derivative of a tanh longitudinal magnetization transition. Expressions for the PW₅₀ versus flying height are obtained by fitting the widths of the theoretically determined playback pulses. It is found that the playback properties of a shielded magnetoresistive head depend strongly on the geometry

Keywords

Fourier series; magnetic fields; magnetic heads; magnetic recording; magnetoresistive devices; surface potential; Fourier series method; MR head geometry; PW₅₀; flying height; longitudinal magnetization transition; magnetic scalar potential; playback pulse shape; playback spectra; semianalytic solutions; shielded magnetoresistive head; surface fields; surface potential; voltage pulse generation; Fourier series; Geometry; Magnetic heads; Magnetic properties; Magnetic shielding; Magnetoresistance; Pulse generation; Pulse shaping methods; Shape; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.390158

Filename

390158