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Magnon Confinement in an All-on-Chip YIG Cavity Resonator Using Hybrid YIG/Py Magnon Barriers

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paragon-plus: 6684094 
van Wees, Bart J.; paragon-plus: 932559 


Confining magnons in cavities can introduce new functionalities to magnonic devices, enabling future magnonic structures to emulate the established photonic and electronic components. As a proof-of-concept, we report magnon confinement in a lithographically defined all-on-chip YIG cavity created between two YIG/Permalloy bilayers. We take advantage of the modified magnetic properties of the covered/uncovered YIG film to define on-chip distinct regions with boundaries capable of confining magnons. We confirm this by measuring multiple spin-pumping voltage peaks in a 400 nm wide platinum strip placed along the center of the cavity. These peaks coincide with multiple spin-wave resonance modes calculated for a YIG slab with the corresponding geometry. The fabrication of micrometer-sized YIG cavities following this technique represents a new approach to control coherent magnons, while the spin-pumping voltage in a nanometer-sized Pt strip demonstrates to be a noninvasive local detector of the magnon resonance intensity.


Publication status: Published


On-chip cavity magnonics, Magnonics, Spin waves, Spin pumping, YIG resonators

Is Part Of


American Chemical Society
H2020 European Research Council (101053054)
FP7 Cooperation (618083)
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NA)
Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen (NA)