YIG/CoFeB bilayer magnonic isolator

Autor(en)

Noura Zenbaa, Khrystyna O. Levchenko, Jaganandha Panda, Kristýna Davídková, Moritz Ruhwedel, Sebastian Knauer, Morris Lindner, Carsten Dubs, Qi Wang, Michal Urbánek, Philipp Pirro, Andrii V. Chumak

Abstrakt

We demonstrate a magnonic isolator based on a bilayer structure of Yttrium Iron Garnet (YIG) and Cobalt Iron Boron (CoFeB). The bilayer exhibits pronounced non-reciprocal 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, while the CoFeB layer introduces strong magnetic anisotropy, critical for achieving the isolator functionality. Experimental results, supported by numerical simulations, show unidirectional propagation of Magnetostatic Surface Spin Waves (MSSW), significantly suppressing backscattered waves. This behavior was confirmed through wavevector-resolved and micro-focused Brillouin Light Scattering measurements and is supported by numerical simulations. The proposed YIG/SiO2/CoFeB bilayer magnonic isolator demonstrates the feasibility of leveraging non-reciprocal spin-wave dynamics for functional magnonic devices, paving the way for energy-efficient, wave-based signal processing technologies.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Brno University of Technology, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Rheinisch-Westfälische Technische Hochschule Aachen, Innovent e.V. Technologieentwicklung Jena, Huazhong University of Science and Technology, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau

Journal

IEEE Magnetics Letters

Band

16

Anzahl der Seiten

5

ISSN

1949-307X

DOI

https://doi.org/10.1109/LMAG.2025.3551990

Publikationsdatum

2025

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus, 103015 Kondensierte Materie

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/33fee4d0-e07b-4c83-a0a7-646a0d8bb10a