Regensburg 2022 – scientific programme

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.7: Poster

Thursday, September 8, 2022, 16:00–18:00, P4

Unidirectional spin wave propagation mediated by Co₂₅Fe₇₅-nanogratings — •Christian Mang^1,2, Monika Scheufele^1,2, Manuel Müller^1,2, Johannes Weber^1,2, Vincent Haueise^1,2, Hans Huebl^1,2,3, Matthias Althammer^1,2, Stephan Geprägs¹, and Rudolf Gross^1,2,3 — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Physik-Department, Technische Universität München, Garching, Germany — ³Munich Center for Quantum Science and Technology (MCQST), München, Germany

Unidirectional spin wave propagation adds additional functionalities to magnonic devices and their potential application in communication technology. We report the fabrication of Co₂₅Fe₇₅-nanogratings via electron beam lithography and DC magneton sputtering on yttrium iron garnet (YIG) thin films. The dipolar magnetic interactions between the Co₂₅Fe₇₅-nanogratings and the YIG-film give rise to a finite non-reciprocity of the spin wave propagation in the YIG-film for a collinear magnetization configuration of the Co₂₅Fe₇₅-gratings and the YIG-film [1]. By performing spin wave spectroscopy, we study the coupled spin wave modes of the Co₂₅Fe₇₅-nanogratings and the YIG thin films in the Damon-Eshbach geometry using a vector network analyzer.
[1] J. Chen et al., Phys. Rev. B 100, 104427, (2019)