SKM 2023 – scientific programme
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MA: Fachverband Magnetismus
MA 16: Magnonics
MA 16.3: Talk
Tuesday, March 28, 2023, 10:00–10:15, HSZ 403
Finite-element micromagnetic modeling of spin-wave propagation with the open-source package TetraX — •Lukas Körber1,2, Gwendolyn Quasebarth1,2, Alexander Hempel1,2, Andreas Otto2, Jürgen Fassbender1,2, and Attila Kákay1 — 1Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, Dresden Germany — 2Fakultät Physik, Technische Universität Dresden
We present a finite-element-method (FEM) dynamic-matrix approach to efficiently calculate the dispersion and spatial mode profiles of spin waves propagating in waveguides with arbitrary cross-section, where the equilibrium magnetization is invariant along the propagation direction. This is achieved by solving a linearized version of the equation of motion of the magnetization numerically only in a single cross-section of the waveguide at hand. To compute the dipolar field, we present an extension of the well-known Fredkin-Koehler method to plane waves. The presented dynamic-matrix approach is implemented within our recently published open-source micromagnetic modeling package TetraX [1], which aims to provide user-friendly and versatile FEM workflows for the magnonics community (not only for the magnonics community but FEM simulations in general), covering several classes of sample geometries and, soon, also antiferromagnets. As a brief introduction, this talk will include a short live demo of TetraX.
[1] https://gitlab.hzdr.de/micromagnetic-modeling/tetrax