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Quadratic Scaling of Intrinsic Gilbert Damping with Spin-Orbital Coupling in L1(0) FePdPt Films: Experiments and Ab Initio Calculations
He, P. Zhou, S. M. Ma, X. Zhao, H. B. Luepke, G. Zhao, H. B.
He, P.
Zhou, S. M.
Ma, X.
Zhao, H. B.
Luepke, G.
Zhao, H. B.
Abstract
The dependence of the intrinsic Gilbert damping parameter alpha(0) on the spin-orbital coupling strength xi is investigated in L1(0) ordered FePd1-xPtx films by time-resolved magneto-optical Kerr effect measurements and spin-dependent ab initio calculations. Continuous tuning of alpha(0) over more than one order of magnitude is realized by changing the Pt/Pd concentration ratio showing that alpha(0) is proportional to xi(2) as changes of other leading parameters are found to be negligible. The perpendicular magnetic anisotropy is shown to have a similar variation trend with x. The present results may facilitate the design and fabrication of new magnetic alloys with large perpendicular magnetic anisotropy and tailored damping properties. DOI: 10.1103/PhysRevLett.110.077203
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2013-01-01
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Applied Science
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https://doi.org/10.1103/PhysRevLett.110.077203