Other Bubble Device Forms
“Two-level permalloy bar” where the gap is not defined by W0, but can be smaller.
“Charged-wall” devices using a different mechanism for localizing the bubble and for propagating it so that the need for gaps in the propagation pattern is eliminated. In these devices then the bubble size can be smaller then the minimum feature, instead of larger as in PB, so that d < W0.
“Lattice” devices where the bubbles are allowed to interact and can thus be closer together so that P ≃ 2d instead of 4−5d.
“Current Sheet” devices where the bubbles are propagated under the influence of fields from current-carrying conductor sheet(s) and the rotating field and the drive field coils are eliminated.
KeywordsCurrent Sheet Bubble Size Bias Field Lattice Translation Minor Loop
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