Current-induced vortex displacement and annihilation in a single Permalloy disk

Details Current-induced vortex displacement and annihilation in a single Permalloy disk Current-induced vortex displacement and annihilation in a single Permalloy disk

2005-11-02

arxiv.org/abs/cond-mat/0511040v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 4 figures

Scientific paper

10.1103/PhysRevB.74.014424

The induced motion of a magnetic vortex in a micron-sized ferromagnetic disk due to the DC current injection is studied by measuring planar Hall effect. The DC current injection is found to induce the spin torque that sweeps the vortex out of the disk at the critical current while bias magnetic field are applied. The current-induced vortex core displacement deduced from the change in planar Hall resistance is quantitatively consistent with theoretical prediction. Peak structures similar to those originated from spin wave excitations are observed in the differential planar Hall resistance curve.

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