| 摘要 |
PURPOSE:To completely interrupt the magnetic coupling of both cores, to minimize the distance between the clearances of both cores and to correspond to a high density recording by arranging the thin film of a superconducting material on the facing surface of a head core for recording and reproducing and a head core for erasing as a spacer material. CONSTITUTION:A core 11 for recording and reproducing and a core 12 for erasing are arranged while respective cavities 13 and 14 are estranged for an arbitrary time in a time axis direction and a thin film 16 of a room temperature superconducting material is provided on the facing surface as a spacer material. A Meissner effect having a room temperature superconducting material thin film 16 is used, the interference of the signal due to the magnetic coupling of both cores 11 and 12 is eliminated, an S/N is improved, a film thickness tS of the room temperature superconducting material as a spacer material 16 is thinned and thus, a distance (t) between a cavity 13 for recording and reproducing and a cavity 14 for erasing can be minimized. |
