Current-Controlled Magnon-Magnon Coupling in an On-Chip Cavity Resonator
arXiv:2506.11867 · doi:10.1021/acs.nanolett.5c01746
Abstract
Harnessing spin currents to control magnon dynamics enables new functionalities in magnonic devices. Here, we demonstrate current-controlled magnon-magnon coupling between cavity and boundary modes in an ultrathin film of Bi-doped yttrium iron garnet (BiYIG). Cavity modes emerge in a BiYIG region between two Pt nanostripes, where interfacial anisotropy modifies the magnon dispersion. These modes hybridize with boundary magnons confined within the Pt-capped BiYIG, resulting in an anticrossing gap. Modeling based on dipole-exchange spin-wave dispersion accurately reproduces the observed modes and their hybridization. Spin current injection via the spin Hall effect in a Pt nanostripe disrupts the cavity boundary conditions and suppresses both cavity modes and hybridization upon driving the system beyond the damping compensation threshold. Furthermore, tuning the microwave power applied to a microstrip antenna enables controlled detuning of the anticrossing gap. Our findings provide a platform for exploring spin current-magnon interactions and designing on-chip reconfigurable magnonic devices.
References in corpus (18)
- Strongly coupled magnons and cavity microwave photons
- Quantum magnonics: when magnon spintronics meets quantum information science
- Magnetic texture based magnonics
- Magnetization oscillations and waves driven by pure spin currents
- Spin Insulatronics
- Chiral spin-wave velocities induced by all-garnet interfacial Dzyaloshinskii-Moriya interaction in ultrathin yttrium iron garnet films
- Spin-orbit-torque magnonics
- Observation and control of hybrid spin-wave-Meissner-current transport modes
- True amplification of spin waves in magnonic nano-waveguides
- Nonlinear magnon polaritons
- Strong On-Chip Microwave Photon-Magnon Coupling Using Ultra-low Damping Epitaxial Y3Fe5O12 Films at 2 Kelvin
- Higgs and Goldstone spin-wave modes in striped magnetic texture
- Magnon confinement in an all-on-chip YIG cavity resonator using hybrid YIG/Py magnon barriers
- Cavity-mediated coupling of antiferromagnetic spin waves
- Nonlinear longitudinal and transverse magnetoresistances due to current-induced magnon creation-annihilation processes
- Perpendicular magnetic anisotropy in insulating ferrimagnetic gadolinium iron garnet thin films
- Parametric resonance of spin waves in ferromagnetic nanowires tuned by spin Hall torque
- Control of magnon-photon coupling by spin torque