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TT: Fachverband Tiefe Temperaturen
TT 76: Focus Session: Curvilinear magnetism: Magnetics with nanoscale curved geometries (joint session MA/TT)
TT 76.8: Vortrag
Donnerstag, 12. März 2026, 12:45–13:00, POT/0151
Coherent Spin Waves in Curved Ferromagnetic Nanocaps of a 3D-printed Magnonic Crystal — •Kilian Lenz1, Huixin Guo2, Mateusz Golebiewski3, Ryszard Narkowicz1, Jürgen Lindner1, Maciej Krawczyk3, and Dirk Grundler2 — 1Inst. of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Germany — 2School of Engineering, Institute of Materials,Laboratory of Nanoscale Magnetic Materials and Magnonics, École Polytechnique Fédérale de Lausanne, Switzerland — 3Institute of Spintronics and Quantum Information, Adam Mickiewicz University, Poznań, Poland
In this work we present ferromagnetic resonance measurements and simulations of a 3D magnonic crystals embedded in an on-chip microresonator. It was realized by two-photon lithography of a 3D woodpile structure and atomic layer deposition of a 30-nm-thin Ni film. Operated near 14 and 24 GHz, the microresonator output revealed numerous coherent magnons with distinct angular dependencies reflecting the underlying face-centered cubic lattice. The micromagnetic simulations show that some of the edge modes are localized at the curved nanocaps and that they remain robust against changes of the field orientation. These cap modes exhibit an unexpected phase evolution. The findings advance the development of functional microwave circuits with 3D magnonic crystals and strengthen their visionary prospects for edge-dominated magnon modes.
Keywords: 3D magnonics; ferromagnetic resonance; spin waves