| 摘要 |
PURPOSE:To suppress the flapping phenomenon of the frequency characteristic of a reproducing output by a contour effect by forming high temperature superconductive members between a metal magnetic member and a high magnetic permeability ferrite so as to oppose in parallel to an operating gap and through the operating gap. CONSTITUTION:The high temperature superconductive member 4a is formed physically or according to a method such as a sputtering in the boundary part of the metal magnetic film 1c and the high magnetic permeability ferrite 1a so as to oppose in parallel to the operating gap 1b and through the operating gap 1c. When a recording current is passed to a coil 1f, a magnetic flux is generated in the high magnetic permeability ferrite 1a and the magnetic flux is converged to the operating gap 1b by a magnetic circuit to record. According to the Meissner effect by the high temperature superconductive member 4a formed in the boundary part of the metal magnetic film 1c and the high magnetic permeability ferrite 1a, the magnetic flux is not leaked in the direction of a recording medium, so that a pseudo gap does not effectively depend. The flapping phenomenon of the frequency characteristic of the reproducing output is eliminated. |
