Compact tunable YIG-based RF resonators
José Diogo Costa, Bruno Figeys, Xiao Sun, Nele Van Hoovels, Harrie A. C. Tilmans, Florin Ciubotaru, Christoph Adelmann
Abstract
We report on the design, fabrication, and characterization of compact tunable yttrium iron garnet (YIG)-based RF resonators based on μm-sized spin-wave cavities. Inductive antennas with both ladder and meander configurations were used as transducers between spin waves and RF signals. The excitation of ferromagnetic resonance and standing spin waves in the YIG cavities led to sharp resonances with quality factors up to 350. The observed spectra were in excellent agreement with a model based on the spin-wave dispersion relations in YIG, showing a high magnetic field tunability of about 29 MHz/mT.
Topics & Concepts
Yttrium iron garnetMaterials scienceResonatorFerromagnetic resonanceSpin waveExcitationOptoelectronicsResonance (particle physics)Dispersion (optics)Quality (philosophy)FerromagnetismMagnetic fieldRadio frequencyMeander (mathematics)MicrowaveQ factorCoupling (piping)Dispersion relationCharacterization (materials science)Inductive couplingYttriumField (mathematics)Wide-bandgap semiconductorTransducerSpin (aerodynamics)Standing waveSpectral lineCondensed matter physicsMagneto-Optical Properties and ApplicationsMagnetic properties of thin filmsMultiferroics and related materials