Inverse-design of two-dimensional magnonic crystals via topology optimization with frequency-domain micromagnetics
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915837288382464 |
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| author | Nagaoka, Ryunosuke Yamazaki, Takahiro Mitsumata, Chiharu Iwasaki, Yuma Kotsugi, Masato |
| author_facet | Nagaoka, Ryunosuke Yamazaki, Takahiro Mitsumata, Chiharu Iwasaki, Yuma Kotsugi, Masato |
| contents | Magnonic crystals (MCs) are emerging spintronic metamaterials capable of manipulating transmission properties of magnons, the quanta of spin waves. Due to the complex relationship between lattice geometry and magnonic band dispersion, it remains challenging to establish general design strategies for optimizing targeted properties in MCs. In this study, we demonstrated an inverse-design framework for two-dimensional MCs to explore unconventional lattice structures with large magnonic band gaps. We employed genetic algorithms to enable global exploration of structures with a complete band gap as the objective property, and used frequency-domain micromagnetic simulations for computationally efficient band gap evaluation. Our established inverse-design method successfully discovered several previously unreported designs of MCs, whose performance was validated using time-domain micromagnetic simulations. Furthermore, we observed that the design landscape becomes increasingly non-convex at high-order bands, suggesting the existence of multiple design solutions. The overall inverse-design framework is expected to be broadly applicable to experimentally accessible material systems and device dimensions, facilitating the formulation of design rules for MCs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_05132 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Inverse-design of two-dimensional magnonic crystals via topology optimization with frequency-domain micromagnetics Nagaoka, Ryunosuke Yamazaki, Takahiro Mitsumata, Chiharu Iwasaki, Yuma Kotsugi, Masato Materials Science Chemical Physics Computational Physics Magnonic crystals (MCs) are emerging spintronic metamaterials capable of manipulating transmission properties of magnons, the quanta of spin waves. Due to the complex relationship between lattice geometry and magnonic band dispersion, it remains challenging to establish general design strategies for optimizing targeted properties in MCs. In this study, we demonstrated an inverse-design framework for two-dimensional MCs to explore unconventional lattice structures with large magnonic band gaps. We employed genetic algorithms to enable global exploration of structures with a complete band gap as the objective property, and used frequency-domain micromagnetic simulations for computationally efficient band gap evaluation. Our established inverse-design method successfully discovered several previously unreported designs of MCs, whose performance was validated using time-domain micromagnetic simulations. Furthermore, we observed that the design landscape becomes increasingly non-convex at high-order bands, suggesting the existence of multiple design solutions. The overall inverse-design framework is expected to be broadly applicable to experimentally accessible material systems and device dimensions, facilitating the formulation of design rules for MCs. |
| title | Inverse-design of two-dimensional magnonic crystals via topology optimization with frequency-domain micromagnetics |
| topic | Materials Science Chemical Physics Computational Physics |
| url | https://arxiv.org/abs/2603.05132 |