Spin waves in Co$_2$FeGe films
D. Popadiuk, A. Vovk, S.A. Bunyaev, G.N. Kakazei, J.P. Araujo, P., Strichovanec, P.A. Algarabel, V. Golub, A. Kravets, V. Korenivski, A., Trzaskowska
TL;DR
This study investigates the magnetic properties of Co$_2$FeGe thin films, showing how thermal treatment affects spin wave behavior and highlighting their potential for high-speed spintronic and magnonic applications.
Contribution
It demonstrates optimized fabrication conditions for Co$_2$FeGe films to enhance magnetic properties and reveals strong spin wave hybridization relevant for magnonic devices.
Findings
Optimal annealing improves magnetization and exchange stiffness.
Strong hybridization of spin waves observed in Damon-Eshbach geometry.
Films show promising characteristics for spintronic and magnonic applications.
Abstract
The dynamic magnetic properties of Full Heusler alloy thin films of CoFeGe, 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.
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Taxonomy
TopicsMagnetic properties of thin films · Magnetic Properties and Applications · Magnetic Properties of Alloys