Magnon-Magnon Interaction Induced by Dynamic Coupling in a Hybrid Magnonic Crystal.

ABSTRACT: We report a combined experimental and numerical investigation of spin-wave dynamics in a hybrid magnonic crystal consisting of a CoFeB artificial spin ice (ASI) of stadium-shaped nanoelements patterned atop a continuous NiFe film separated by a 5 nm Al₂O₃ spacer. Using Brillouin light scattering spectroscopy, we probe the frequency dependence of thermal spin waves as functions of applied magnetic field and wavevector, revealing the decisive role of interlayer dipolar coupling in the magnetization dynamics. Micromagnetic simulations complement the experiments, showing a strong interplay between ASI edge modes and backward volume modes in the NiFe film. The contrast in saturation magnetization between CoFeB and NiFe enhances this coupling, leading to a pronounced hybrid

SUBMITTER: Sultana R 

PROVIDER: S-EPMC12805633 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature