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Dynamics and Topology of Micromagnetic Vortices

Alberto Verga 1, 2 
2 CPT - E6 Nanophysique
CPT - Centre de Physique Théorique - UMR 7332
Abstract : Magnetic vortices are topologically stable magnetization configurations at the nanoscale. When subject to a current polarized in spin, exchange interaction with the itinerant electrons, modify the configuration of the fixed spins. The spin-transfer torque effect, as experimentally observed, is able to change the magnetization topology. We investigate the relation between the dynamics of magnetic vortices driven by a spin-polarized current and the changes in the magnetization topology. These transitions are characterized by the appearance of magnetic singularities.
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Alberto Verga. Dynamics and Topology of Micromagnetic Vortices. Chaos, Complexity and Transport CCT'15, Jun 2015, Marseille, France. pp.54 - 82, ⟨10.1142/9789813202740_0002⟩. ⟨hal-01500461⟩



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