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Band structure engineering of two-dimensional magnonic vortex crystals

MPG-Autoren
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Meier,  Guido
Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany;

Externe Ressourcen

http://dx.doi.org/10.1103/PhysRevB.91.224417
(Verlagsversion)

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PhysRevB.91.224417.pdf
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Zitation

Behncke, C., Hänze, M., Adolff, C. F., Weigand, M., & Meier, G. (2015). Band structure engineering of two-dimensional magnonic vortex crystals. Physical Review B, 91(22): 224417. doi:10.1103/PhysRevB.91.224417.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0028-14AC-9
Zusammenfassung
Magnonic vortex crystals are studied via scanning transmission x-ray microscopy and ferromagnetic-resonance spectroscopy. We investigate a two-dimensional vortex crystal by imprinting waves with tunable wave vectors. The dispersion relation ω(k) is determined via ferromagnetic-resonance spectroscopy with a tunable frequency and wave vector for two vortex core polarization patterns that are adjusted by self-organized state formation prior to the measurement. We demonstrate that the band structure of the crystal is reprogrammed by tuning the vortex polarizations.