Abstract
The velocity of domain walls driven by current in zero magnetic field is measured in permalloy nanowires using real-time resistance measurements. The domain wall velocity increases with increasing current density, reaching a maximum velocity of when the current density in the nanowire reaches . Such high current driven domain wall velocities exceed the estimated rate at which spin angular momentum is transferred to the domain wall from the flow of spin polarized conduction electrons, suggesting that other driving mechanisms, such as linear momentum transfer, need to be taken into account.
- Received 21 August 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.037204
©2007 American Physical Society