Unidirectional propagation of zero-momentum magnons
We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations.
Authors
- Michal Urbánek (ORCID: https://orcid.org/0000-0003-0072-2073)
- Jan Klíma (ORCID: https://orcid.org/0009-0002-1838-5546)
- J. Panda (ORCID: https://orcid.org/0000-0003-4400-8701)
- Jan Michalička (ORCID: https://orcid.org/0000-0001-6231-0061)
- Andrii V. Chumak (ORCID: https://orcid.org/0000-0001-5515-0848)
- Jakub Holobrádek (ORCID: https://orcid.org/0000-0003-4632-2067)
- Tomáš Lednický (ORCID: https://orcid.org/0000-0003-0564-1862)
- Ondřej Wojewoda (ORCID: https://orcid.org/0000-0002-4276-520X)
- Jakub Krčma (ORCID: https://orcid.org/0009-0001-8647-1692)
- Dominik Pavelka (ORCID: https://orcid.org/0009-0001-9253-5365)
- Ekaterina Pribytova (ORCID: https://orcid.org/0009-0006-6506-9238)
Institutions
- University of Vienna (AT)
- Central European Institute of Technology (CZ)
- Brno University of Technology (CZ)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2024-09-23
- DOI
- https://doi.org/10.1063/5.0218478
- Citations
- 9
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 3.04
Funders
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Grantová Agentura České Republiky
- Austrian Science Fund
- Central European Institute of Technology
- HORIZON EUROPE Framework Programme
- HORIZON EUROPE European Innovation Council