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Two Dimensional Field Access Bubble Lattice File

IP.com Disclosure Number: IPCOM000086806D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Chang, H: AUTHOR [+2]

Abstract

An array of asymmetric chevron elements is used to move a high density bubble domain lattice in either the row direction or the column direction. Attractive magnetic poles are established by the rotating drive field to move bubble domains in the lattice, and bubble-bubble interaction moves bubble domains not actively driven by magnetic poles. The desired direction of bubble domain motion is selected by using two different drive field ranges at a fixed magnetic bias field range and/or two different bias field ranges at a given drive field range.

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Two Dimensional Field Access Bubble Lattice File

An array of asymmetric chevron elements is used to move a high density bubble domain lattice in either the row direction or the column direction. Attractive magnetic poles are established by the rotating drive field to move bubble domains in the lattice, and bubble-bubble interaction moves bubble domains not actively driven by magnetic poles. The desired direction of bubble domain motion is selected by using two different drive field ranges at a fixed magnetic bias field range and/or two different bias field ranges at a given drive field range.

The chevron array shown in Fig. 1 was used to move the bubble domains along a 60 degree direction, i.e., along the direction of the columns of the bubble domains, using a magnetic bias field H(z) = 20 Oe and a rotating drive field H = 30 Oe. In order to provide lattice motion along the 0 degree direction, i.e., along the direction of the lattice rows, the bias field H(z) was 2O Oe, while the rotating magnetic field H was 70 Oe.

Bubble domains can be moved back and forth along either the row direction or the column direction depending upon the sense of the rotation of the rotating field H. Thus, bidirectional motion along the 0 degree axis of the lattice and the 60 degree axis of the lattice is provided.

Fig. 2 shows the actual chevron element dimensions used in the lattice translation described above.

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