Fig. 3

Dynamical properties of BiYIG films with PMA. a Sketch of the epitaxial configuration for Bi₁Y₂IG films, films are grown under tensile strain giving rise to tetragonal distortion of the unit cell. b Out-of-plane angular dependence of the peak-to-peak FMR linewidth (ΔH_pp) at 8 GHz on a 30 nm thick Bi₁Y₂IG//sGGG with PMA (the continuous line is a guide for the eye). The geometry of the measurement is shown in top right of the graph. The wide disparity of the value for the peak to peak linewidth ΔH_pp is attributed to the two-magnons scattering process and inhomogeneties in the sample. c FMR absorption linewidth of 0.3 mT for the same film at measured at θ = 27°. d Frequency dependence of the FMR linewidth. The calculated Gilbert damping parameter and the extrinsic linewidth are displayed on the graph