Unveiling Magnon–Magnon Coupling and its Dynamic Control in Nanomagnets

Hybrid magnonics, exploring the coupling between magnons and quantum systems, is an exciting field for developing next‐generation information technologies. Achieving a strong and tunable magnon–magnon coupling (MMC) in confined nanomagnets is crucial for the on‐chip integration of these hybrid systems and advancing the field. This work numerically investigates the interactions between different magnon modes excited within an elliptical magnonic nanodisc (EMND), demonstrating an anticrossing effect in the dispersion spectra. A comprehensive theoretical framework is presented, which explains this anticrossing phenomenon as a result of MMC and provides estimates for the strength of the coupling ( g ). Furthermore, this intermodal coupling can be tuned from a strong coupling regime ( g = 300 MHz) to a weak coupling regime by varying the direction of the external magnetic field and the intrinsic properties of the EMND. Combined numerical and theoretical findings offer new insights into MMC, significantly advancing the field of quantum magnonics and magnon‐based quantum information technology.