TY - JOUR
T1 - Simulation study of the Gilbert damping in Ni80Fe20/Nd bilayers
T2 - comparison with experiments
AU - Cao, Lulu
AU - Ruta, Sergiu
AU - Khamtawi, Rungtawan
AU - Chureemart, Phanwadee
AU - Zhai, Ya
AU - Evans, Richard F.L.
AU - Chantrell, Roy W.
N1 - © 2024 The Author(s). Published by IOP Publishing Ltd
PY - 2024/5/3
Y1 - 2024/5/3
N2 - 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.
AB - 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.
KW - atomistic spin model
KW - spin accumulation model
KW - spin pumping
UR - http://www.scopus.com/inward/record.url?scp=85192112074&partnerID=8YFLogxK
U2 - 10.1088/1361-648X/ad294e
DO - 10.1088/1361-648X/ad294e
M3 - Article
C2 - 38354418
AN - SCOPUS:85192112074
SN - 0953-8984
VL - 36
JO - Journal of physics. Condensed matter : an Institute of Physics journal
JF - Journal of physics. Condensed matter : an Institute of Physics journal
IS - 30
M1 - 305901
ER -