We investigate the effect of spin transport on nonlinear excitations in a ferromagnetic nanowire with nonuniform magnetizations. In the presence of spin-polarized current, the exact soliton solutions propagating along the wire’s axis are obtained in two cases of high or low quality factors $\left(Q\right)$. The current can change the velocities of magnetic solitons and affect the solitons’ collision with phase shift. Also, ac current induces vibration of the center of the solitons.

• Received 16 November 2004

DOI:https://doi.org/10.1103/PhysRevB.72.064410