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Gilbert-like damping caused by time retardation in atomistic magnetization dynamics
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Saale, Germany..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, no 10, 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
2015. Vol. 92, no 10, 104403
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-262948DOI: 10.1103/PhysRevB.92.104403ISI: 000360600900001OAI: oai:DiVA.org:uu-262948DiVA: diva2:858422
Funder
Swedish Research CouncileSSENCE - An eScience CollaborationKnut and Alice Wallenberg Foundation
Available from: 2015-10-02 Created: 2015-09-23 Last updated: 2017-12-01Bibliographically approved

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Thonig, DannyEriksson, Olle

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