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Talks and Poster Presentations (without Proceedings-Entry):

C. Abert, M. Ruggeri, C. Vogler, F. Bruckner, G. Hrkac, M. Page, D. Praetorius, D. Süss:
"Finite element simulation of magnetic microstructures including spin-diffusion effects";
Talk: 59th Annual Magnetism and Magnetic Materials Conference, Honolulu, Hawaii; 11-03-2014 - 11-07-2014.



English abstract:
We implement a finite element scheme that solves the Landau-Lifshitz-Gilbert equation coupled to a diffusion equation accounting for spin-polarized currents. The latter solves for the spin accumulation not only in magnetic materials but also in nonmagnetic conductors. This bidirectional coupling properly models current induced switching in multilayer structures. No presumptions on the spin polarization of the current are required since the complete system including the polarizing fixed layer is simulated. Moreover this model accurately describes current driven domain-wall motion again without any presumption on the spin polarization of the current. The applied finite element scheme is shown to be unconditionally convergent
and enables the simulation of complex shapes and heterogeneous materials. We present simulation results for the current driven domain-wall motion in a nanowire, as well as the switching of an MRAM-like multilayer system. As predicted by theory the soft-magnetic free layer can be switched to align either parallel or anti parallel with a hard-magnetic fixed layer depending on the direction of the applied current.

Keywords:
Landau-Lifshitz-Gilbert equation, micromagnetics, finite element method, spin accumulation

Created from the Publication Database of the Vienna University of Technology.