Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 15: Poster I
MA 15.26: Poster
Tuesday, March 18, 2025, 10:00–12:30, P1
Micromagnetic Mumax3 simulations of spin-waves under the influence of stray field landscapes — •Fabian Samad1,2, Attila Kákay2, and Olav Hellwig1,2 — 1University of Technology Chemnitz, Chemnitz, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
In most spin-wave application concepts the capability of manipulating and confining the spin-waves is pivotal. One promising way is the usage of hybrid systems [1,2], where the spin-wave transport layer is not directly manipulated, e.g. by patterning, but instead is influenced by a "programming" layer. In our study, we choose for the programming layer a synthetic antiferromagnet (SAF) with perpendicular magnetic anisotropy (PMA) [3], which acts on a spin-wave transport layer via its stray field. The SAF can exhibit a variety of magnetic states depending on the energy parameters and the applied magnetic field, making it -- and thus the hybrid system -- field-reconfigurable. By performing Mumax3 simulations, we investigate the influence of the stray field of various magnetic patterns in the SAF on the spin-wave dispersion in a layer with YIG-type properties. Particularly, we focus on regular and periodic magnetic domains in the SAF, which can be stabilised e.g. by means of focussed ion beam irradiation and manipulated with external magnetic fields [4].
References: [1] Qin et al., Nano Letters 22, 5294 (2022) [2] Szulc et al., ACS Nano 16, 14168 (2022) [3] Hellwig et al., JMMM 319, 13 (2007) [4] Samad et al., APL 119, 022409 (2021)
Keywords: Synthetic Antiferromagnets; Stray field; Spin wave; Hybrid structure