Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.77: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Electric field effect on spin-wave`s dynamics in antiferromagnets — •Olha Boliasova1,2 and Vladimir Krivoruchko2 — 1Leibniz Institute for Solid State and Materials Research Dresden, Dresden, Germany — 2Donetsk Institute for Physics and Engineering named after O.O. Galkin, Kyiv, Ukraine
Spin-waves (SWs) are promising candidates for encoding and processing information as they are not affected by Joule heating and can provide low losses during their propagation. It is proposed to use magnetochiral SW non- reciprocity for the implementation in magnonic devices. Difference between propagation SWs in opposite directions could be realized in chiral magnets with intrinsic inversion breaking symmetry. Similar effects could be acquired in the nonchiral magnets by applying external static electric field. The Dzyaloshinskii-Moriya interaction (DMI) induced by an external electric field, due to the Aharonov-Casher phase shift, changes spatial dynamics of SWs. Moreover, it influences the SWs damping, as well. This is important for the practical application of observed phenomenon and now it is one of the highly debated topics in the magnonics. In our contribution, we study how the DMI generated by an external static electric field modifies the SWs dispersion in the two-sublattice antiferromagnet structure. For describing antiferromagnets, we used the phenomenological Landau-Lifshitz-Gilbert equation. It is shown that spectra are asymmetrical concerning the wave vector and the level of the asymmetry grows with DMI increasing. Right-handed and left-handed SWs attenuate in different velocities, too.