Browse Prior Art Database

Bubble Domain Propagation Channelling by Thin Permalloy Strips

IP.com Disclosure Number: IPCOM000083283D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Lin, YS: AUTHOR

Abstract

A thin permalloy layer placed in direct contact with a bubble material has been suggested for suppression of hard bubbles, and improvement of operating margin. It has been found that a bubble which adheres to the boundary of the thin permalloy region is relatively stable. This edge effect is attributed to the magnetostatic coupling associated with the step of the permalloy layer.

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 100% of the total text.

Page 1 of 2

Bubble Domain Propagation Channelling by Thin Permalloy Strips

A thin permalloy layer placed in direct contact with a bubble material has been suggested for suppression of hard bubbles, and improvement of operating margin. It has been found that a bubble which adheres to the boundary of the thin permalloy region is relatively stable. This edge effect is attributed to the magnetostatic coupling associated with the step of the permalloy layer.

It is proposed to use this edge effect to form channels for bubble propagation in: (a) conductor circuits (see Fig. 1); (b) angelfish circuits (see Fig. 2): and (c) propagation circuits external to a lattice storage area (see Fig. 3). The advantage of the structures of Figs. 1 and 2 over the conventional circuits, is that the storage density is no longer limited by the size of the permalloy dots and rails.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]