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Bubble Domain Splitter using Angelfish Circuits

IP.com Disclosure Number: IPCOM000076243D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Lin, YS: AUTHOR

Abstract

A bubble domain splitter which provides the splitting function during propagation of a bubble domain is shown in Figs. A-C. The splitter utilizes a permalloy angelfish circuit located on both sides of the medium in which the bubble domain is propagating.

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Bubble Domain Splitter using Angelfish Circuits

A bubble domain splitter which provides the splitting function during propagation of a bubble domain is shown in Figs. A-C. The splitter utilizes a permalloy angelfish circuit located on both sides of the medium in which the bubble domain is propagating.

In Fig. A, bubble domain BD enters the bubble splitter in the direction indicated by arrow 1. The permalloy pattern shown in solid lines is located on the top of orthoferrite 2 in which the bubble domain propagates, while the permalloy pattern shown in dashed lines is located on the bottom of orthoferrite 2. The splitting function occurs at the junction between these orthogonally positioned patterns. As bubble domain BD travels in the direction of arrow 1, it is trapped at position 3 because the orientation of permalloy wedge (a) is reversed.

During the expansion phase, domain BD will be elongated horizontally under the influence of the top permalloy pattern. In the contraction phase, permalloy wedges (a) and (b) of the bottom pattern create a pinching field which divides the bubble into two halves BD1 and BD2. These new bubble domains then travel to the right and left, respectively, under the influence of the top permalloy pattern. In this device, no replication current loop is required.

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