Numerical simulation of spin transport in systems with complex geometry
M. V. Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 1199991 Moscow, Russia
2 SPINTEC, UMR CEA/CNRS/UJF-Grenoble1/Grenoble-INP, INAC, 38054 Grenoble, France
* Timofey Andrianov: email@example.com
Published online: 4 July 2018
The spin diffusion and charge equations in Levy-Fert and Waintal models were numerically solved, using finite element method in complex non-collinear geometry with strongly inhomogeneous current flow. As an illustration, spin-dependent transport through a magnetic pillar and nonmagnetic spacer separating two magnetic layers was investigated. It is shown, that the structure with number of pillars gives a higher value of Giant Magnetoresistance (GMR) effect rather than a structure with one pillar of equivalent diameter. The inhomogeneity of spin currents, which has one of the strongest impacts on GMR effect value leads to the occurrence of spin-current vortices. Introduction of lT and lL lengths in Waintal model gives a better description of angular dependence of GMR effect rather than Levy-Fert model.
© The Authors, published by EDP Sciences, 2018
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