| 摘要 |
PURPOSE:To achieve high reproduction output, by making recording with good efficiency at low power, through the location of magnetic member around the main magnetic pole and auxiliary magnetic poles. CONSTITUTION:Cylindrical magnetic materials 19, 20 such as ferrite and permalloy are located around a main magnetic pole 15 and an auxiliary magnetic pole 16, and they are linked with a linking magnetic material. Thus, magnetic line of force spread for surrounding can be concentrated and an inverse magnetic field in a horizontal magnetizing film 17 can be lost. Only a vertical magnetizing film 18 under the main magnetic pole reaches a saturated magnetic field. Thus, recording with low power and high efficiency can be made and a high reproduction output can be achieved. |
