Current-driven vortex domain wall dynamics by micromagnetic simulations

Details Current-driven vortex domain wall dynamics by micromagnetic simulations Current-driven vortex domain wall dynamics by micromagnetic simulations

2006-05-04

arxiv.org/abs/cond-mat/0605125v2

Phys. Rev. B 73, 184408 (2006)

Physics

Condensed Matter

Materials Science

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.73.184408

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.

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