Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: Poster I

MA 20.13: Poster

Dienstag, 19. März 2024, 16:30–19:00, Poster A

Micromagnetic Simulations of Spin Wave Propagation in Patterned YIG Magnonic Filters — •Luisa J. Borngräber, Stephanie Lake, Seth W. Kurfman, and Georg Schmidt — Institut für Physik, Martin Luther Universität Halle-Wittenberg, Halle, Germany

A primary objective for magnon-based computing is efficient control of spin wave propagation and long-lived magnon excitations. The former can be achieved through the use of magnonic crystals, while the latter requires low-loss materials (e.g. yttrium iron garnet or YIG). However, previous studies on YIG-based magnonic crystals required destructive means [1] of fabricating the devices or required the integration of lossy metallic magnets [2]. An alternative means to produce these devices is to lithographically pattern YIG structures on existing YIG thin films.

Here, we present micromagnetic simulations of magnonic crystals containing only YIG. We show that propagating surface modes (i.e. Damon-Eshbach or DE) can be critically suppressed upon incidence with periodic YIG steps in selective bands while maintaining high transmission between these bands. Therefore, these structures produce efficient filtering and propagation in devices that can be fabricated by standard lithographic techniques and room-temperature YIG deposition on existing films [3] without introducing additional damage-induced losses.

References: [1] Serga et al. J. Phys. D: Appl. Phys. 43 264002 (2010). [2] Qin et al., Nat. Comm. 9, 5445 (2018). [3] Hauser et al. Sci. Rep. 6, 20827 (2016).

Keywords: magnonic crystals; YIG; micromagnetic simulation