Scaling of intrinsic Gilbert damping with spin-orbital coupling strength

Details Scaling of intrinsic Gilbert damping with spin-orbital coupling strength Scaling of intrinsic Gilbert damping with spin-orbital coupling strength

2012-03-03

arxiv.org/abs/1203.0607v1

Physics

Condensed Matter

Materials Science

4 pages, 5 figures

Scientific paper

We have experimentally and theoretically investigated the dependence of the intrinsic Gilbert damping parameter $\alpha_0$ on the spin-orbital coupling strength $\xi$ by using L1$_{\mathrm{0}}$ ordered FePd$_{\mathrm{1-x}}$Pt$_{\mathrm{x}}$ ternary alloy films with perpendicular magnetic anisotropy. With the time-resolved magneto-optical Kerr effect, $\alpha_0$ is found to increase by more than a factor of ten when $x$ varies from 0 to 1.0. Since changes of other leading parameters are found to be neglected, the $\alpha_0$ has for the first time been proven to be proportional to $\xi^2$.

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