Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 21: Poster I

MA 21.32: Poster

Dienstag, 13. März 2018, 09:30–13:00, Poster A

Investigation of spin wave modes in laterally confined Yttrium-Iron-Garnet (YIG) thin films — •Philipp Geyer, Maximilian Paleschke, Philip Trempler, and Georg Schmidt — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle(Saale)

Magnonics is promising for the realization of low power information storage and processing, by excitation of the spin lattice rather than by moving electrons. In confined structures the propagation and damping of spin waves strongly depends on the geometry. For example shape anisotropy fields can change the dispersion in different directions. Different geometries thus lead to fundamentally different resonance characteristics. In contrast to a rather complicated analytical description for example by using Green functions theory, micromagnetic simulations provide an easy way to examine different structures theoretically. We have performed micromagnetic simulations of magnetic nanostructures with mumax3 [1] which we can compare to experimental results. For the experiments arrays of identical nanostructures were investigated by ferromagnetic resonance. The structures were fabricated from thin YIG films with very low damping [2]. The results show numerous standing spin wave modes including edge modes. Besides rectangular shapes also other geometries like triangles were successfully investigated.

[1] "The design and verification of mumax3", AIP Advances 4, 107133 (2014)

[2] C. Hauser et. al., Scientific Reports 6, 20827 (2016)