Spin-current vortices in current-perpendicular-to-plane nanoconstricted spin-valves

Details Spin-current vortices in current-perpendicular-to-plane nanoconstricted spin-valves Spin-current vortices in current-perpendicular-to-plane nanoconstricted spin-valves

2010-01-29

arxiv.org/abs/1001.5367v2

Phys. Rev. B 84, 024416 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 5 figures

Scientific paper

10.1103/PhysRevB.84.024416

The charge and spin diffusion equations taking into account spin-flip and spin-transfer torque were numerically solved using a finite element method in complex non-collinear geometry with strongly inhomogeneous current flow. As an illustration, spin-dependent transport through a non-magnetic nanoconstriction separating two magnetic layers was investigated. Unexpected results such as vortices of spin-currents in the vicinity of the nanoconstriction were obtained. The angular variations of magnetoresistance and spin-transfer torque are strongly influenced by the structure geometry.

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