Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.36: Poster
Dienstag, 6. September 2022, 17:30–20:00, P2
Finite-element dynamic-matrix approach for propagating spin waves: Extension to mono- and multilayers of arbitrary spacing and thickness — •Alexander Hempel1,2, Lukas Körber1,2, Andreas Otto2, Rodolfo Gallardo3,4, Yves Henry5, and Attila Kákay1 — 1Helmholtz-Zentrum Dresden - Rossendorf, Germany — 2Technische Universität Dresden, Germany — 3UTFSM, Chile — 4CEDENNA, Chile — 5IPCMS, France
Over the last few years micromagnetic simulations became an important tool in the field of magnonics. In a recent work Körber et al. [1] presented an efficient method to numerically determine the dispersion and the spatial mode profiles of spin-waves propagating in waveguides with arbitrary cross section, if the equilibrium magnetization is invariant along the propagation direction. In this work their finite-element dynamic-matrix approach is used as a starting point to develop a tool to investigate propagating spin waves in mono- and multilayers. This approach has the advantage, that the linearized equation of motion is solved in just a section of the layers, and has therefore a comparatively low numerical complexity. Nevertheless the dipolar interaction still requires special care and we show how an extension of the Fredkin-Koehler method can be used to handle this problem. As a validation of the method, which is implemented into the open source FEM micromagnetic package TetraX [2], we present a variety of simulation results and compare them with analytics and other numerical approaches.
[1] Körber et al., AIP Advances 11, 095006 (2021). [2] TetraX - DOI: 10.14278/rodare.1418