Calculation of Gilbert damping in ferromagnetic films

The Gilbert damping constant in the phenomenological Landau-Lifshitz-Gilbert equation which describes the dynamics of magnetization, is calculated for Fe, Co and Ni bulk ferromagnets, Co films and Co/Pd bilayers within a nine-band tight-binding model with spin-orbit coupling included. The calculation...

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Main Authors: Edwards D. M., Cinal M., Barati E., Umerski A.
Format: Article
Language:English
Published: EDP Sciences 2013-01-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/20134018003
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spelling doaj-0b0e27cc06ee48ddb43d2052ab4d5c362021-08-02T11:28:58ZengEDP SciencesEPJ Web of Conferences2100-014X2013-01-01401800310.1051/epjconf/20134018003Calculation of Gilbert damping in ferromagnetic filmsEdwards D. M.Cinal M.Barati E.Umerski A.The Gilbert damping constant in the phenomenological Landau-Lifshitz-Gilbert equation which describes the dynamics of magnetization, is calculated for Fe, Co and Ni bulk ferromagnets, Co films and Co/Pd bilayers within a nine-band tight-binding model with spin-orbit coupling included. The calculational effciency is remarkably improved by introducing finite temperature into the electronic occupation factors and subsequent summation over the Matsubara frequencies. The calculated dependence of Gilbert damping constant on scattering rate for bulk Fe, Co and Ni is in good agreement with the results of previous ab initio calculations. Calculations are reported for ferromagnetic Co metallic films and Co/Pd bilayers. The dependence of the Gilbert damping constant on Co film thickness, for various scattering rates, is studied and compared with recent experiments.http://dx.doi.org/10.1051/epjconf/20134018003
collection DOAJ
language English
format Article
sources DOAJ
author Edwards D. M.
Cinal M.
Barati E.
Umerski A.
spellingShingle Edwards D. M.
Cinal M.
Barati E.
Umerski A.
Calculation of Gilbert damping in ferromagnetic films
EPJ Web of Conferences
author_facet Edwards D. M.
Cinal M.
Barati E.
Umerski A.
author_sort Edwards D. M.
title Calculation of Gilbert damping in ferromagnetic films
title_short Calculation of Gilbert damping in ferromagnetic films
title_full Calculation of Gilbert damping in ferromagnetic films
title_fullStr Calculation of Gilbert damping in ferromagnetic films
title_full_unstemmed Calculation of Gilbert damping in ferromagnetic films
title_sort calculation of gilbert damping in ferromagnetic films
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2013-01-01
description The Gilbert damping constant in the phenomenological Landau-Lifshitz-Gilbert equation which describes the dynamics of magnetization, is calculated for Fe, Co and Ni bulk ferromagnets, Co films and Co/Pd bilayers within a nine-band tight-binding model with spin-orbit coupling included. The calculational effciency is remarkably improved by introducing finite temperature into the electronic occupation factors and subsequent summation over the Matsubara frequencies. The calculated dependence of Gilbert damping constant on scattering rate for bulk Fe, Co and Ni is in good agreement with the results of previous ab initio calculations. Calculations are reported for ferromagnetic Co metallic films and Co/Pd bilayers. The dependence of the Gilbert damping constant on Co film thickness, for various scattering rates, is studied and compared with recent experiments.
url http://dx.doi.org/10.1051/epjconf/20134018003
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