| 摘要 |
PURPOSE:To prevent the sharp drop of the margin width of bias magnetic field of a magnetic bubble and obtain stable operation of the magnetic bubble by setting the ratio of the diameter (d) of the magnetic bubble to the height (h) of the bubble, h/d, to a specified value. CONSTITUTION:When a bubble having a diameter of <=2mum is used, its diameter (d) and height (h) are specified to have a relation h/d<=0.8 between them. Therefore, the height of the bubble is relatively low and the bubble has a flat shape to obtaine the relation at d>h. Since the shape of the bubble is made flat, interference between bubbles is reduced and the sufficiently large margin width of bias magnetic field can be obtained even when the bubble density of a minor loop (m) is made large and, therefore, the stability of the bubble operation can be improved.
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