Low-damping sub-10-nm thin films of lutetium iron garnet grown by molecular-beam epitaxy
نویسندگان
چکیده
We analyze the structural and magnetic characteristics of (111)-oriented lutetium iron garnet (Lu3Fe5O12) films grown by molecular-beam epitaxy, for films as thin as 2.8 nm. Thicknessdependent measurements of the inand 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 11:1ð9Þ 10 4 for 5.3 nm films and 32ð3Þ 10 4 for 2.8 nm films, among the lowest values reported to date for any insulating ferrimagnetic sample of comparable thickness. Published by AIP Publishing. [http://dx.doi.org/10.1063/1.4967695]
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