Dynamics of Domain Wall in a Biaxial Ferromagnet With Spin-torque

Details Dynamics of Domain Wall in a Biaxial Ferromagnet With Spin-torque Dynamics of Domain Wall in a Biaxial Ferromagnet With Spin-torque

2004-10-30

arxiv.org/abs/cond-mat/0411005v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7pages, 3figures

Scientific paper

10.1103/PhysRevB.71.224419

The dynamics of the domain wall (DW) in a biaxial ferromagnet interacting with a spin-polarized current are described by sine-gordon (SG) equation coupled with Gilbert damping term in this paper. Within our frame-work of this model, we obtain a threshold of the current in the motion of a single DW with the perturbation theory on kink soliton solution to the corresponding ferromagnetic system, and the threshold is shown to be dependent on the Gilbert damping term. Also, the motion properties of the DW are discussed for the zero- and nonzero-damping cases, which shows that our theory to describe the dynamics of the DW are self-consistent.

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