Dresden 2020 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 42: Posters Magnetism I

MA 42.16: Poster

Mittwoch, 18. März 2020, 15:00–18:00, P3

Non-equilibrium spin dynamics and statics enforced by spin currents in ferrimagnetic nanofilms — •Sina Ludewig, Dennis Meyer, and Henning Ulrichs — 1. Physical Institute, Georg-August-University Göttingen, 37077 Göttingen, Germany

On this poster, we report about our investigations of highly non-linear spin dynamics in nanometer-thick Yttrium-Iron-Garnet (YIG) films, induced by means of spin currents, which are generated via the spin-Hall effect. Using micromagnetic simulation we identify a dynamic regime hosting localized, non-propagating solitons, a turbulent chaotic regime, as well as a quasi-static phase featuring a stripe-like magnetization texture, and eventually at largest spin current a homogeneously switched state. To actually realize such dynamics, we propose YIG films grown by metal-organic aerosol deposition, as well as sputtered beta-tungsten (β-W) as a material with large spin-Hall angle. Concerning β-W, we include on this poster our recent progress regarding the reproducible growth of this non-equilibrium structural phase.

We acknowledge financial support by the DFG within the SFB 1073.