The influence of some head and tape constants on the signal recorded on a magnetic tape

With recording heads of conventional design, the distribution of magnetization through the depth of a recorded tape may be markedly non-uniform to an extent depending upon the h.f. bias setting. An analysis of this effect is shown to be of value in explaining several aspects of recording performance, including the anomalous loss of high-frequency response commonly observed when using large values of h.f. bias.An analysis of the self-demagnetizing fields created within a recorded tape is also given, and an attempt is made to relate the losses these introduce into the high-frequency performance of the system to the dimensional and magnetic constants of the tape.