Effect of dipolar interactions on cavity magnon-polaritons
arXiv:2009.04557 · doi:10.1103/PhysRevB.102.224421
Abstract
The strong photon-magnon coupling between an electromagnetic cavity and two yttrium iron garnet (YIG) spheres has been investigated in the context of a strong mutual dipolar interaction between the spheres. A decrease in the coupling strength between the YIG spheres and the electromagnetic cavity is observed, along with an increase of the total magnetic losses, as the distance between the spheres is decreased. A model of inhomogeneous broadening of the ferromagnetic resonance linewidth, partly mitigated by the dipolar narrowing effect, reproduces the reduction in the coupling strength observed experimentally. These findings have important implications for the understanding of strongly coupled photon-magnon system involving densely packed magnetic objects, such as ferromagnetic nanowires arrays, in which the total coupling strength with an electromagnetic cavity might become limited due to mutual dipolar interactions.
arXiv comment5 pages, 5 figures
References in corpus (15)
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
- High Cooperativity Cavity QED with Magnons at Microwave Frequencies
- High cooperativity coupling of electron-spin ensembles to superconducting cavities
- Magnon dark modes and gradient memory
- Strong-field interactions between a nanomagnet and a photonic cavity
- Cavity quantum electrodynamics with ferromagnetic magnons in a small yttrium-iron-garnet sphere
- Strong Coupling between Microwave Photons and Nanomagnet Magnons
- Exchange Magnon-Polaritons in Microwave Cavities
- Cavity mediated manipulation of distant spin currents using cavity-magnon-polariton
- Exceptional magnetic sensitivity of PT-symmetric cavity magnon polaritons
- Cavity mediated coherent coupling of magnetic moments
- Identification of spin wave modes strongly coupled to a co-axial cavity
- Linking Magnon-Cavity Strong Coupling to Magnon-Polaritons through Effective Permeability