| 摘要 |
PURPOSE:To perform vertical magnetic recording without using an auxiliary pole so as to simplify the structure, reduce the cost, and make the assembling work easier, by controlling the electric current made flow to two independent coils of a ring type head. CONSTITUTION:When a main pole 13 and a ring type head 14 having two independent coils 15 and 16 are installed and an appropriate electric current is made flow to the coils 15 and 16, the magnetic field thus formed can be concentrated at the main pole 13 and vertical magnetic recording can be performed on a vertical magnetic recording medium 18, because a magnetic field which performs recording in the direction of length does not occur at a gap 17. That is to say, the direction and value of the electric current made flow to the coils 15 and 16 are changed depending on the winding method, number of turns, and position of the coils 15 and 16, but, basically, the electric current is controlled in such a way that the magnetic fields produced at the coils 15 and 16 are produced in the same direction so that they do not close inside the ring type head, and recording in the direction of length is not performed at the gap 17. |
