Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Magnetic Semiconductors, Magnetization Dynamics and Damping
MA 43.8: Vortrag
Donnerstag, 21. März 2024, 17:00–17:15, EB 202
Anisotropic Gilbert damping in reduced dimensions from theoretical calculations — Balázs Nagyfalusi1,2, László Szunyogh2, and •Krisztián Palotás1,2 — 1Wigner Research Center for Physics, Budapest, Hungary — 2Institute of Physics, Budapest University of Technology and Economics, Budapest, Hungary
The energy-dissipative damping process plays an important role in magnetization dynamics. The in-depth understanding of the magnetization damping is crucial for the development of spintronic applications in the future. Based on a recently implemented ab initio calculation method of the diagonal elements of the atomic-site-dependent Gilbert damping tensor within the real-space Screened Korringa-Kohn-Rostoker (SKKR) framework, anisotropy effects of the Gilbert damping are studied. For (001)-oriented surfaces of ferromagnetic Fe and Co it is pointed out that in the vicinity of the surface the corresponding transverse Gilbert damping tensor components are substantially varied depending on the magnetization direction. This effect is even more enhanced considering monolayer-thick 2D films of Fe and Co studied on noble metal surfaces. Finally, taking Fe and Co single adatoms and magnetic dimers, the occurrence of anisotropic damping is also demonstrated. The effect of the identified anisotropic dampings should be included into future spin dynamics simulations aiming at an improved accuracy.
Keywords: Gilbert damping; anisotropy; SKKR; iron; cobalt