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Sample configuration and the experimental geometry with the external magnetic field H applied out-of-plane.
Magneto-optical rotation of Co/garnet bilayer using (a) L-MOKE and (b) Faraday techniques. (c) Experimental FMR line with marked values of the bandwidth ΔH for contributions of 2 nm Co layer and 1.8 μm garnet film.
Time-resolved Faraday rotation as a function of the delay time Δt for different amplitudes of the applied magnetic field H. The red solid lines were fitted using FFT analysis and Eq. (1) .
Frequency as a function of amplitude of external field H for garnet (full points) and Co (open points) contributions of a bilayer. Error bars are smaller than the data point markers. The calculated FMR frequency curves are also shown using the magnetic anisotropy constants (solid lines) and measured FMR data (stars). The top panel is a graphical illustration of the precessional dynamics for (a) H = 1.47 kOe, (b) 2.31 kOe, and (c) 4.22 kOe.
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