| 摘要 |
PURPOSE:To form symmetrical recording magnetization by supplying recording currents asymmetrically to recording coils divided into two parts and compensating the asymmetry of the recording magnetization by the interference of an erasing magnetic flux with recording magnetic fluxes. CONSTITUTION:Since a current supplying circuit 20 supplies the recording currents asymmetrically to the coils 7, 8, the magnetic energies generated by the coils 7, 8 are different from each other. The recording magnetic flux A' in the same direction as the direction of the erasing magnetic flux E, therefrom, decreases and the recording magnetic flux B' in the direction different therefrom increases. Since the erasing magnetic flux E in the specified direction by an erasing head 2 exists at this time, the magnetic flux A' increases and the magnetic flux B' decreases if the magnetic flux E interferes with the magnetic fluxes A', B'. The interference of the magnetic flux E is thereby eventually cancelled so that the magnetic fluxes A', B' are equal to each other in the directions different from each other. The asymmetry of the recording magnetization is compensated by the interference of the erasing magnetic flux with the recording magnetic fluxes in the above-mentioned manner; therefore, the symmetrical magnetization is obtd. |
