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4 October 2024 Ultrastrong magnon-magnon coupling and magnon frequency combs in a dipolar 3D multilayered artificial spin-vortex ice
Jack C. Gartside
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Proceedings Volume PC13119, Spintronics XVII; PC1311919 (2024) https://doi.org/10.1117/12.3028391
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
Strongly-interacting nanomagnetic arrays are ideal systems for exploring the frontiers of magnonic control. They provide functional reconfigurable platforms and attractive technological solutions across storage, GHz communications and neuromorphic computing. Typically, these systems are primarily constrained by their range of accessible states and the strength of magnon coupling phenomena. Increasingly, nanomagnetism has explored the benefits of expanding into 3D. This has broadened the horizons of magnetic microstate spaces and functional behaviours, but precise control of 3D states and dynamics remains challenging. Here, we introduce a 3D magnonic metamaterial compatible with widely-available fabrication and characterisation techniques. By combining independently-programmable artificial spin-systems strongly coupled in the z-plane, we create a system with a rich 16^N microstate space and intense static and dynamic dipolar magnetic coupling. The system exhibits a broad range of emergent phenomena including ultrastrong magnon-magnon coupling with normalised coupling rates of Δω/γ=0.57, GHz mode shifts in zero applied field and reconfigurable generation of magnon frequency combs
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Jack C. Gartside "Ultrastrong magnon-magnon coupling and magnon frequency combs in a dipolar 3D multilayered artificial spin-vortex ice", Proc. SPIE PC13119, Spintronics XVII, PC1311919 (4 October 2024); https://doi.org/10.1117/12.3028391
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KEYWORDS
Magnons
Frequency combs
Ice
Multilayers
Fabrication
Inductive coupling
Magnetism
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