Unidirectional propagation of zero-momentum magnons

Autor(en)

Ondřej Wojewoda, Jakub Holobrádek, Dominik Pavelka, Ekaterina Pribytova, Jakub Krčma, Jan Klíma, Jaganandha Panda, Jan Michalička, Tomáš Lednický, Andrii V. Chumak, Michal Urbánek

Abstrakt

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.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Brno University of Technology

Journal

Applied Physics Letters

Band

125

Anzahl der Seiten

6

ISSN

0003-6951

DOI

https://doi.org/10.1063/5.0218478

Publikationsdatum

09-2024

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103017 Magnetismus

ASJC Scopus Sachgebiete

Physics and Astronomy (miscellaneous)

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/b82bfcbc-06cd-4bf7-a5f3-533cd79d0217