Browse Prior Art Database

Bubble Splitter with One Layer Metallization

IP.com Disclosure Number: IPCOM000076245D
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

Chang, H: AUTHOR

Abstract

Fig. A. shows a permalloy "T" and "I" bar pattern located on a bubble domain sustaining material, such as orthoferrite 14. The permalloy pattern, together with rotating in-plane magnetic field H causes bubbles to propagate in the orthoferrite.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 88% of the total text.

Page 1 of 2

Bubble Splitter with One Layer Metallization

Fig. A. shows a permalloy "T" and "I" bar pattern located on a bubble domain sustaining material, such as orthoferrite 14. The permalloy pattern, together with rotating in-plane magnetic field H causes bubbles to propagate in the orthoferrite.

The bubble inputs into the bubble splitter, after which the split bubbles move in the direction of the arrows 10 and 12. The path indicated by arrow 10 is arranged to be as equally favorable as the path indicated by arrow 12.

The actual splitting of bubble domain BD is shown in Figs. B1-B4. Here, only a portion of the permalloy pattern of Fig. A is shown, since the splitting forces which occur in the neighborhood of permalloy patterns L1 and L2 are described.

In Fig. B1, bubble domain DB is advancing from position 1 to position 2. The magnetic field regions around positions 2 on L1 and L2 both attract bubble domain BD, thus elongating it as shown in Fig. B2. As magnetic field H reaches direction 3, bubble domain BD further elongates toward the left due to the attraction of the positive pole on the corner of L1. The right-hand tip of L1 exerts a magnetic field opposing the magnetization of bubble domain BD, thus pinching the bubble domain in its center, as shown in Fig. B3. When magnetic field H reaches direction 4, bubble domain BD further elongates and is pinched in the center at positions 2 on L1 and L2, as shown in Fig. B4. Thus, bubble domain BD is split into two individual b...