Journal
PHYSICAL REVIEW B
Volume 80, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.054413
Keywords
ferromagnetism; magnetic anisotropy; magnetic domain walls; magnetic transitions
Funding
- Swiss NSF
Ask authors/readers for more resources
Taking into account the coupling between the position of the wall and an internal degree of freedom, namely, its phase phi, we examine, in the rigid-wall approximation, the dynamics of a magnetic domain wall subject to a weak pinning potential. We determine the corresponding force-velocity characteristics, which display several unusual features when compared to the standard depinning behavior. At zero temperature, there exists a bistable regime for low forces, with a logarithmic behavior close to the transition. For weak pinning, there occurs a succession of bistable transitions corresponding to different topological modes of the phase evolution. At finite temperature, the force-velocity characteristics become nonmonotonous. We compare our results to recent experiments on permalloy nanowires.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available