Self-Generation of Spatiotemporal Parametric Patterns in Active Ring Resonators Based on Single- and Bicomponent Magnonic Quasicrystals

This article presents the experimental results that demonstrate the formation of spatiotemporal parametric patterns in active ring resonators based on 1-D single- and bicomponent magnonic quasicrystals (MQCs). Such patterns are formed through the nonlinear parametric three-wave decay of a magnetostatic surface spin wave (MSSW). It is shown that in the active ring resonator based on the single-component MQC (SCMQC) made from a ferrite film, the spatial patterns of magnetization are localized in the grooves at an MSSW frequency and in the crests at a frequency of parametrically excited exchanged spin waves (ESWs). In the active ring resonator based on the bicomponent MQC (BCMQC) (the ferromagnetic permalloy strips located on a ferrite film surface), the magnetization localization is observed in free parts of the ferrite film both at the MSSW frequency and at the frequency of parametrically excited ESWs.