An azimuth record head for minimizing and equalizing crosstalk between tracks of opposite azimuths

摘要

In an azimuth recording format, the crosstalk of the A channel into the B channel is higher than the crosstalk of the B channel into the A channel because, at the ends of a magnetic recording where the switching contour (14e-14g) of constant magnetic field strength is equal to the media magnetization switching field, the switching contour follows a curve (38). The resulting curvature (44,46) at the ends of the magnetic recording vary accordingly the angle of azimuth rejection between the B to A azimuth relative to the A to B azimuth at the edges of the track. The use of a record head (58,90,124) of a unique design wherein the trailing pole face (68,102,130) of the head extends laterally beyond its leading pole face (66,100,132) at the over-writing side of the head, removes the curvature at the ends of the transition recordings (70) forming the recorded tracks. In such record heads, the switching contour generated at the trailing pole face (74,14) of the gap at the over-writing side of the head enters and exits the trailing core generally normal to the pole face and at points thereon which are spaced beyond the corresponding end of the leading core face. Thus, no curvature is generated at the end of the recordings which perform over-writing of the previous adjacent tracks recorded in the media. Thus, the record heads show the same minimized level of crosstalk between the A to B or the B to A azimuth channels.