Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.50: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Anisotropic spin dynamics in Mn2Au/Ni80Fe20 thin-film bilayers — •Gutenberg Kendzo1, Hassan Al-Hamdo1, Vitaliy Vasyuchka1, Philipp Pirro1, Yaryna Lytvynenko2, Olena Gomonay2, Mathias Kläui2, Martin Jourdan2, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, Germany
Ferromagnets and antiferromagnets host qualitatively different spin dynamics. At the ferromagnet/antiferromagnet interface we thus expect coupled spin dynamics of hybrid character. We experimentally investigate the anisotropic coupling of spin dynamics in antiferromagnetic/ferromagnetic (Mn2Au/Ni80Fe20) thin-film heterostructures by ferromagnetic resonance spectroscopy. To this end, we carried out measurements on two samples Mn2Au(40nm)/Ni80Fe20(10nm; 7,5nm) as a function of the orientation of the static external magnetic field. For each orientation, the ferromagnetic resonance frequency at fixed magnetic field magnitude was measured. We find a pronounced anisotropy of the Ni80Fe20 ferromagnetic resonance. This finding is attributed to coupling of the Ni80Fe20 magnetization to the Mn2Au Néel vector in conjunction with the Mn2Au crystalline anisotropy.
Funding by DFG via CRC/TRR 173 "Spin+X", projects A01, A05,
B12 & B13 is gratefully acknowledged.
[1] S. P. Bommanaboyena et al., Nat. Commun. 12, 6539 (2021).