| 摘要 |
PURPOSE:To prevent the malfunction of a bubble and to improve bias margin by forming a bubble transferring path having an end part that is folded at bad track value side of a crystal in nearly U-shape, and eliminating a part where an end of concaved side of a minor loop whose both ends are uneven is opposed to an adjoining track. CONSTITUTION:In a minor loop 10, a bubble transferring path having end parts 11, 12 where a saw tooth type linear propagating pattern is folded in the bad track side of a crystal is formed in U-shape. The arrow R shows the direction of rotation of a driving magnetic field, and the arrow P shows direction of advance of the bubble. In the end part 12 of concaved side of the minor loop 10, a corner part 13 opposite to adjoining track is eliminated obliquely within the limit that does not exert a bad influence on bubble transferring. Accordingly, the jumping of bubble to adjoining track at the end of the minor loop, i.e. the malfunction, is prevented. |
