High Spin-Wave Propagation Length Consistent with Low Damping in a Metallic Ferromagnet
arXiv:1904.11321 · doi:10.1063/1.5102132
Abstract
We report ultra-low intrinsic magnetic damping in CoFe heterostructures, reaching the low regime at room temperature. By using a broadband ferromagnetic resonance technique, we extracted the dynamic magnetic properties of several CoFe-based heterostructures with varying ferromagnetic layer thickness. By estimating the eddy current contribution to damping, measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26\,nm thick sample to be $$α_{\mathrm{0}} \lesssim 3.18\times10^{-4}(21\pm1)\,\mathrm{μm}_{\text{25}}_{\text{75}}$ heterostructure at room temperature, which is in excellent agreement with the measured damping.
arXiv commentUpdated Version
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