Hybridization of spin-wave modes in a ferromagnetic microstrip

The dependence of the spectrum of spin-wave modes (SWMs) in a permalloy microstrip on the angle θ between the microstrip axis and the direction of the in-plane bias magnetic field has been studied with the use of ferromagnetic resonance at a frequency of 9.85 GHz. Hybridization between the quasi-homogeneous SWM and weakly localized SWM, which manifests itself as the repulsion of absorption lines of the microstrip spectrum, has been discovered at the angle θ ≈ 70°. The experimental results are in fair agreement with the numerically calculated SWM spectrum.