Current-driven vortex wall dynamics is studied by means of a two-dimensional analytical model and micromagnetic simulation. By constructing a trial function for the vortex wall in the magnetic wire, we analytically solve for domain wall velocity and deformation in the presence of the current-induced spin torque. A critical current for the domain wall transformation from the vortex wall to the transverse wall is calculated. A comparison between the field- and current-driven wall dynamics is carried out. Micromagnetic simulations are performed to verify our analytical results.
@article{arxiv.cond-mat/0605125,
title = {Current-driven vortex domain wall dynamics by micromagnetic simulations},
author = {Jiexuan He and Zhanjie Li and Shufeng Zhang},
journal= {arXiv preprint arXiv:cond-mat/0605125},
year = {2009}
}