| 摘要 |
PURPOSE:To stabilize recording and movement of recording bits stably by forming a part having a different magnetic energy in a soft magnetic film magnetized easily vertically to the film surface by ion implantation and generating a cylindrical magnetic domain along the boundary part between this part and a part different in magnetic energy. CONSTITUTION:An area 21 having a different magnetic energy is formed in the soft magnetic film magnetized easily vertically to the film surface, to which a bias magnetic field is so applied that magnetization is vertical to the film surface and is directed to one direction, by ion implantation. A magnetic bubble (b) of the cylindrical magnetic domain is formed in the left upper corner or the like of the boundary part between the area 21 and an area, where ions are not implanted, along the boundary part by irradiation or laser light or the like to perform thermal magnetooptic recording. Then, the bubble (b) is recorded stably in this boundary part because force Fc applied to the bubble (b) is a prescribed value. Similarly, the bubble (b) is moved stably along boundaries of the area 21 to move recording bits stably. |
