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Gilbert-like damping caused by time retardation in atomistic magnetization dynamics
Department of Physics and Astronomy, Material Theory, University Uppsala, Uppsala, Sweden.ORCID iD: 0000-0001-8007-5392
Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany.
Department of Physics and Astronomy, Material Theory, University Uppsala, Uppsala, Sweden.
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, no 10, article id 104403Article in journal (Refereed) Published
Abstract [en]

Gilbert-like damping in magnetization dynamics is commonly attributed to the interplay of the spin, the electron, and the phonon reservoirs. Spatial correlations within the spin reservoir itself, for example magnons, mediate damping as well. We show theoretically that temporal correlations within the spin reservoir cause a similar effect. We investigate the role of time retardation in the atomistic Landau-Lifshitz-Gilbert equation using two different retardation kernels. Although viscous damping is explicitly excluded, we find both analytically and numerically that damping and higher-order effects emerge due to time retardation. Thus, our results establish a mechanism for damping and inertia in magnetic systems.

Place, publisher, year, edition, pages
American Physical Society, 2015. Vol. 92, no 10, article id 104403
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:oru:diva-83934DOI: 10.1103/PhysRevB.92.104403ISI: 000360600900001Scopus ID: 2-s2.0-84942532096OAI: oai:DiVA.org:oru-83934DiVA, id: diva2:1449102
Available from: 2020-06-29 Created: 2020-06-29 Last updated: 2020-06-29Bibliographically approved

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Thonig, Danny

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