Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 20: Poster I

MA 20.14: Poster

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

Micromagnetic simulation of nanogratings as possible devices for unidirectional spin wave propagation — •Markus Kügle^1,2, Monika Scheufele^1,2, Matthias Althammer^1,2, Hans Huebl^1,2,3, Stephan Geprägs¹, and Rudolf Gross^1,2,3 — ¹Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Technical University of Munich, TUM School of Natural Sciences, Physics Department, Garching, Germany — ³Munich Center for Quantum Science and Technology (MCQST), Munich, Germany

Devices enabling unidirectional spin wave (SW) propagation have emerged as promising candidates for the next generation of magnonic logic devices. Here, we investigate a possible realization of such a system in ferromagnetic nanogratings positioned on planar thin films, which act as the SW medium. In this approach, the dipolar coupling induced by the grating is seen as the origin of a finite non-reciprocity in the SW propagation [1]. Using micromagnetic simulations, we first focus on the broadband ferromagnetic resonance response, the SW transport as well as the SW dispersion relation of such ferromagnetic nanogratings. This allows us to determine the mutual coupling regimes of the nanowires when varying wire width and spacing. We then analyze possible unidirectional SW propagation effects in bilayers of ferromagnetic nanogratings on planar ferromagnetic thin films and compare the simulations to experimental results of Co₂₅Fe₇₅ nanogratings on yttrium iron garnet thin films.

Keywords: unidirectional transport; nanogratings; spin waves; micromagnetic simulation