A new theoretical approach to digital magnetic recording

The significance of the form of the assumed magnetization variation is studied in calculations of transition widths, output voltage waveforms and the effects of pulse crowding. While different transitions tend to have limited effects on pulse widths and output voltage waveforms, the effects on pulse-crowding roll-off curves are shown to be important showing the need for a very accurate knowledge of the transition profiles. Error function and hyperbolic-tangent-shaped transitions are investigated, following evidence from T.C. Arnoldussen and H.C. Tong (1980) that the former may be nearer to the true transition shape.