Fig. 5
From: Metallic ferromagnetic films with magnetic damping under 1.4 × 10−3
Determination of Gilbert damping. Representative ferromagnetic resonance (FMR) absorption derivative spectra for the a Cr(2.8 nm)/Co25Fe75(6.8 nm)/MgO(001) and b Cr(2.8 nm)/Co25Fe75(6.8 nm)/MAO(001) sample at ϕ H = 45° measured at f = 8 GHz, which give a FMR linewidth of 12.5 and 5.4 Oe, respectively. Frequency vs. resonance field plots for the Co25Fe75 films on c MgO and d MAO measured at ϕ H = 45°, from which the anisotropy terms and effective saturation magnetization are extracted. e Frequency dependencies of the FMR linewidths for the Co25Fe75 films on MgO (red) and MAO (blue), where the behavior below 8 and 7 GHz, respectively, reflects incomplete saturation of the films leading to increases in the inhomogeneous broadening. The solid lines are linear fits to the frequency range above 8 (7) GHz for the film on MgO (MAO), from which the Gilbert damping and inhomogeneous broadening are extracted
