While twisted magnonic crystals (MCs) have recently gained attention for their intriguing linear phenomena, such as magnon flat bands, their nonlinear dynamics—particularly the generation of magnonic frequency combs (MFCs)—have remained largely unexplored. In this work, we demonstrate the creation of MFCs in twisted MCs using two-tone microwave excitation. We find that finite twist angles significantly enhance three-magnon interactions, driven by the noncollinear ground-state magnetic configuration induced by interlayer dipole-dipole interactions. The coupling strength of three-magnon interactions exhibits a plateau-like dependence on the twist angle. Moreover, the magnon band structure is modified by twisting, resulting in band gaps diminishing and even vanishing at certain angular ranges. The combination of the two unique roles of twisting reveals an optimal range of twist angles for achieving high-quality MFCs with a large number of comb teeth. Our findings deepen the understanding of nonlinear interactions in twisted MCs and highlight their potential for advancing moiré-based materials in information processing and high-precision metrology.

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• Magnonic crystals
• Micromagnetism
• Spin waves
• Moire materials