Magnetic racetrack with current-controlled motion of domain walls within an undulating energy landscape
US7667994B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2009 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Sep 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/933
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for use with a magnetic racetrack device includes placing domain walls having a first structure and domain walls having a second, different structure along the racetrack at stable positions corresponding to different regions within the device. The domain walls having the first structure and the domain walls having the second structure occupy alternating positions along the racetrack. A current pulse is applied to the racetrack, so that each of the domain walls moves to an adjacent region. This results in a transformation of the domain walls having the first structure into domain walls having the second structure, and vice versa. The first structure may be a vortex structure and the second structure may be a transverse structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.