Magnetic recording and reproducing system with composite magnetic head

A magnetic recording and reproducing system with a composite magnetic head whose surface facing a magnetic recording medium is composed at least of a ferromagnetic metal and a high permeability ferrite single crystal, and at least whose region close to a gap is composed of said ferromagnetic metal, wherein said composite magnetic head is arranged in such a fashion that the {110} plane of said high permeability ferrite single crystal or a plane inclined from the {110} plane within such a range where the characteristics of the {110} plane are not lost is made to coincide with a plane forming a principal magnetic circuit of said composite head, that the <100>

• direction lying inside the {110} plane is inclined at an angle within the range of from 15.degree. to 75.degree. with respect to a direction perpendicular to the surface facing said magnetic recording medium, and that said magnetic recording medium travels in a direction which is relatively the same as, and parallel to, a vector formed by projecting a vector extending from the inside to the outside of said surface facing said magnetic recording medium in the <100>
• direction, on the surface said magnetic recording medium, whereby the difference between the rate of wear of said ferromagnetic metal and the rate of wear of said high permeability ferrite single crystal is reduced, thereby decreasing the level of a step resulting from the travel of said magnetic recording medium and preventing a reduction of output.