| 摘要 |
PURPOSE:To concentrate magnetic flux in a small area by covering the magnetic pole part of a magnetic core with a cover made of superconducting material and generating the magnetic flux concentratedly through a small through hole formed through the cover. CONSTITUTION:A recording and reproducing coil 2 is wound on a core 1 and a cover made of the superconducting material is fitted in the magnetic pole part of its one end. The cover 3 has an almost rectangular parallelepiped shape and the magnetic pole part of the core 1 is fitted clossely in a rectangular hole part formed on the upper side of the cover 3. A through hole 4 is formed from the bottom part of the rectangular hole to the lower face of the cover 3. Consequently, slitting high-density magnetic flux whose sectional shape is thin can be operated on a medium 5, therefore, even when a main magnetic pole of a conventional opposed head is eliminated, high-performance recording can be performed. Thus, the forming the through hole sufficiently thin, much magnetic flux can be concentrated in the very small area. |
