YIG/CoFeB Bilayer Magnonic Isolator
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Date
2025-05-02
Authors
Zenbaa, Noura
Levchenko, Khrystyna O.
Panda, Jaganandha
Davídková, Kristýna
Ruhwedel, Moritz
Knauer, Sebastian
Lindner, Morris
Dubs, Carsten
Wang, Qi
Urbánek, Michal
ORCID
0000-0003-0072-2073Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
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Abstract
We demonstrate a magnonic isolator based on a bilayer structure of yttrium iron garnet (YIG) and cobalt iron boron (CoFeB). The bilayer exhibits pronounced nonreciprocal spin-wave propagation, enabled by dipolar coupling and the magnetic properties of the two layers. The YIG layer provides low damping and efficient spin-wave propagation, whereas the CoFeB layer introduces strong magnetic anisotropy, critical for achieving the isolator functionality. Experimental results, supported by numerical simulations, show unidirectional propagation of magneto-static surface spin waves, significantly suppressing backscattered waves. This behavior was confirmed through wavevector-resolved and microfocused Brillouin light scattering measurements and is supported by numerical simulations. The developed YIG/SiO2/CoFeB bilayer magnonic isolator demonstrates the feasibility of leveraging nonreciprocal spin-wave dynamics for functional magnonic devices, paving the way for energy-efficient, wave-based signal processing technologies.
Description
Citation
IEEE Magnetics Letters. 2025, vol. 16, issue 1, p. 1-5.
https://ieeexplore.ieee.org/document/10930529
https://ieeexplore.ieee.org/document/10930529
Document type
Peer-reviewed
Document version
Published version
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Language of document
en