A study of magnetic crosstalk in large multitrack head arrays

Single-in-line arrays of perpendicular heads used with double-layer magnetic media, as in high-speed magnetic printers, are treated. It is shown that parasitic recording, or ghost prints, comes from the conjunction of two phenomena: (1) magnetostatic coupling between an active head and its immediate neighbors, resulting in short-range noise with magnetization polarity the same as that of the applied signal; and (2) magnetoelectrodynamic coupling between heads and media layers, resulting in longer range noise with magnetization polarity either reversed or identical to that of signal. Supporting experimental data are presented, and ways to improve performance are indicated