| 摘要 |
PURPOSE:To obtain a reproducing signal without a waveform distortion even when magnetic saturation is generated in a main magnetic pole, by providing a nonmagnetic and conductive film at the side of the main pole facing with a complementary magnetic pole. CONSTITUTION:The lower end plane 5a of a main magnetic pole 5 is faced with the magnetizing layer 2 of a recording medium 1, and performs a recording and a reproduction. Also, at the plane 5b of the main magnetic pole 5 facing with a complementary magnetic pole 6, a non-magnetic and conductive film 10 is provided. Meanwhile, the upper end plane of the main magnetic pole 5 is joined with the horizontal piece 60 of the main magnetic pole 6. In such a constitution, efficiency is improved because a magnetic path 8 in a recording and a reproducing time forms a closed magnetic path passing through a magnetic layer 3 with high permeability in the medium 1. Also, when a coil 7 is excited strongly in order to apply a stronger magnetic flux on the layer 2, the magnetic saturation is generated in the magnetic pole 5, and the magnetic path 81 which tries to pass the plane 5 is generated, and it tries to remain a magnetic component in a horizontal direction at the layer 2. However, an eddy current 11 is generated by the film 10, and a magnetic path 82 in the negating direction of the magnetic flux trying to pass the magnetic path 81, is formed, and the magnetic flux which passes the medium 1 passes the magnetic path 82 only in a thickness direction. |
