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

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 PW/sub 50/ 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.<
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