Browse Prior Art Database

Magnetic Bubble Chirality Detector

IP.com Disclosure Number: IPCOM000083780D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Brown, BR: AUTHOR [+2]

Abstract

A device.which detects the chirality of a magnetic bubble through alteration of the bubble radius in a manner dependent on the chirality is described.

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

Magnetic Bubble Chirality Detector

A device.which detects the chirality of a magnetic bubble through alteration of the bubble radius in a manner dependent on the chirality is described.

The figure illustrates the principle elements of the device. A bubble in an electrically conductive, magnetic film is exposed to an electrical current flowing from the azimuthal field conductor to the substrate. This current interacts with the domain wall chirality in such a way that the bubble expands when the chirality (as viewed from above) is clockwise, or contracts when the chirality is counterclockwise.

Several methods may be used to sense the expansion or contraction. One approach is to operate the device fairly close to the bubble collapse condition, such that additional "chiral compression" collapses and destroys the bubble while expansion preserves the bubble. An alternate method involves the use of standard magneto-optic techniques (Kerr or Faraday effects) in conjunction with optically transparent electrodes to sense the change in bubble radius.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]