Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Magnetic Relaxation and Gilbert Damping
MA 7.3: Talk
Monday, September 5, 2022, 11:30–11:45, H43
Gilbert damping in the real-space KKR method — Balázs Nagyfalusi1, 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 ab-initio determination of Gilbert damping parameters is an important issue for accurate atomistic spin dynamics calculations. Going beyond presently available methods of calculating the Gilbert damping scalar parameter in bulk materials, we implemented the torque-torque correlation formula [1] into the real-space Korringa-Kohn-Rostoker (KKR) method [2] using the Budapest SKKR code to be able to treat chemically inhomogeneous systems. This enables the ab-initio determination of spatially resolved on-site and non-local Gilbert damping tensors [3] in atomic nanostructures. After performing extensive tests for metallic bulk materials to identify the relevant parameter settings of the calculations, we show some examples of inhomogeneous Gilbert damping results in various metallic atomic (nano-)structures.
[1] H. Ebert et al., Phys. Rev. Lett. 107, 066603 (2011). [2] B. Lazarovits et al., Phys. Rev. B 65, 104441 (2002). [3] D. Thonig et al., Phys. Rev. Mater. 2, 013801 (2019).