Title :
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
fDate :
7/1/1995 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
