Spin waves in Co$_2$FeGe films

Authors :: Popadiuk, D.
Vovk, A.
Bunyaev, S. A.
Kakazei, G. N.
Araujo, J. P.
Strichovanec, P.
Algarabel, P. A.
Golub, V.
Kravets, A.
Korenivski, V.
Trzaskowska, A.
Publication Year :: 2024
Abstract: The dynamic magnetic properties of Full Heusler alloy thin films of Co$_2$FeGe, grown on MgO (001) substrates under different thermal conditions, were investigated. Brillouin light scattering and ferromagnetic resonance measurements revealed that depositing at room temperature followed by annealing at 300 deg C for 1 hour produces the best results for maximizing magnetization, exchange stiffness, and minimizing spin-dynamic dissipation in the films, which are desirable characteristics for high-speed spintronic devices. Additionally, strong hybridization of spin waves in the Damon-Eshbach geometry was observed, which is attractive for applications in magnonic signal processing circuits.<br />Comment: 13 pages, 6 figures