| 摘要 |
PURPOSE:To make a magnetic head operate with the optimum gap length at the recording and reproducing time and to improve recording and reproducing efficiency by forming a reproducing gap on a magnetic substance having low saturated magnetic flux density and high magnetic permeability and joining the reproducing gap part with a recording gap part formed on a magnetic substance having highly saturated magnetic flux density and high magnetic permeability. CONSTITUTION:A recording and reproducing magnetic head 11 is constituted by winding a signal I/O coil 13 around a head core 12 forming prescribed gap parts. The head core 12 is obtained by opposing a pair of U-shaped highly saturated magnetic substances 14, forming its one end part so that the sectional area is reduced gradually in the direction to the leading end, forming a gap with gap length g2, joining low saturated magnetic substances 15 to the gap part through a nonmagnetic substance with thickness g1, forming a gap part with gap length g3 on the other end, and joining the gap part through a magnetic substance 17. Consequently, the magnetic head operating with the optimum gap length at the recording and reproducing time and having high recording and reproducing efficiency is obtained. |
