Unidirectional propagation of zero-momentum magnons
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Date
2024-09-23
Authors
Wojewoda, Ondřej
Holobrádek, Jakub
Pavelka, Dominik
Pribytova, Ekaterina
Krčma, Jakub
Klíma, Jan
Panda, Jaganandha
Michalička, Jan
Lednický, Tomáš
Chumak, Andrii V.
0000-0002-4276-520XAdvisor
Referee
Mark
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Publisher
AIP Publishing
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Abstract
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.
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Applied Physics Letters. 2024, vol. 125, issue 13, p. 1-6.
https://pubs.aip.org/aip/apl/article/125/13/132401/3313695/Unidirectional-propagation-of-zero-momentum
https://pubs.aip.org/aip/apl/article/125/13/132401/3313695/Unidirectional-propagation-of-zero-momentum
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Peer-reviewed
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en