Simulation study of the Gilbert damping in Ni80Fe20/Nd bilayers: comparison with experiments

Lulu Cao, Sergiu Ruta, Rungtawan Khamtawi, Phanwadee Chureemart, Ya Zhai, Richard F.L. Evans, Roy W. Chantrell

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We present an experimental and computational investigation the Neodymium thickness dependence of the effective damping constant (αeff) inNi80Fe20/Neodymium (Py/Nd) bilayers. The computational results show that the magnetic damping is strongly dependent on the thickness of Nd, which is in agreement with experimental data. Self consistent solutions of the spin accumulation model and the local magnetisation were used in the simulations. It was not possible to obtain agreement with experiment under the assumption of an enhanced damping in a single Py monolayer. Instead, it was found that the enhanced damping due to spin pumping needed to be spread across two monolayers of Py. This is suggested to arise from interface mixing. Subsequently, the temperature dependence of the effective damping was investigated. It is found that, with increasing temperature, the influence of thermally-induced spin fluctuations on magnetic damping becomes stronger with increasing Nd thickness.

Original languageEnglish
Article number 305901
Number of pages8
JournalJournal of physics. Condensed matter : an Institute of Physics journal
Issue number30
Publication statusPublished - 3 May 2024

Bibliographical note

© 2024 The Author(s). Published by IOP Publishing Ltd


  • atomistic spin model
  • spin accumulation model
  • spin pumping

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