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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2011

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

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Abstract

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 noncollinear geometry with strongly inhomogeneous current flow. As an illustration, spin-dependent transport through a nonmagnetic 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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cea-00853164 , version 1 (26-09-2019)

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N. Strelkov, A. Vedyayev, N. Ryzhanova, D. Gusakova, L. D. Buda-Prejbeanu, et al.. Spin-current vortices in current-perpendicular-to-plane nanoconstricted spin valves. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84 (2), pp.024416. ⟨10.1103/PhysRevB.84.024416⟩. ⟨cea-00853164⟩
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