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arXiv · 1609.04753

Low-damping sub-10-nm thin films of lutetium iron garnet grown by molecular-beam epitaxy

C. L. Jermain·H. Paik·S. V. Aradhya·R. A. Buhrman·D. G. Schlom·D. C. Ralph
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Abstract

We analyze the structural and magnetic characteristics of (111)-oriented lutetium iron garnet (Lu$_3$Fe$_5$O$_{12}$) films grown by molecular-beam epitaxy, for films as thin as 2.8 nm. Thickness-dependent measurements of the in- and out-of-plane ferromagnetic resonance allow us to quantify the effects of two-magnon scattering, along with the surface anisotropy and the saturation magnetization. We achieve effective damping coefficients of $11.1(9) \times 10^{-4}$ for 5.3 nm films and $32(3) \times 10^{-4}$ for 2.8 nm films, among the lowest values reported to date for any insulating ferrimagnetic sample of comparable thickness.

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C. L. Jermain, H. Paik, S. V. Aradhya, R. A. Buhrman, D. G. Schlom, D. C. Ralph. 2016-09-15. Low-damping sub-10-nm thin films of lutetium iron garnet grown by molecular-beam epitaxy. https://doi.org/10.1063/1.4967695

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