Domain-wall-controlled transverse spin injection

E. van der Bijl; R. E. Troncoso; R. A. Duine

doi:10.1103/physrevb.88.064417

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arXiv · 1212.5435

Domain-wall-controlled transverse spin injection

E. van der Bijl·R. E. Troncoso·R. A. Duine

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Abstract

We propose an effect whereby an electric current along the interface between a ferromagnetic and normal metal leads to injection of pure spin current into the normal metal, if the magnetization-direction in the ferromagnet varies along the direction of current. For the specific example of a ferromagnetic domain wall, we compute the inverse spin-Hall effect voltage this spin current gives rise to when injected into a Pt layer. Furthermore, we show that this pure spin current leads to modification of the parameters that govern spin transfer and current-driven domain-wall motion, which can be use to optimize the latter in layered magnetic systems. This effect in principle enables control over the location of spin-current injection in devices.

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E. van der Bijl, R. E. Troncoso, R. A. Duine. 2012-12-21. Domain-wall-controlled transverse spin injection. https://doi.org/10.1103/physrevb.88.064417

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