Ultra-strong coupling of two ferromagnets via Meissner currents
arXiv:2501.16869 · doi:10.1103/j447-3jl4
Abstract
In this work, we study the magnetization dynamics in a ferromagnet/insulator/ferromagnet trilayer sandwiched between two superconductors (S/F/I/F/S heterostructure). It is well-known that a conceptually similar S/F/S system is a platform for implementing ultra-strong magnon-photon coupling. Here, we demonstrate that in such S/F/I/F/S heterostructure, ultra-strong magnon-magnon coupling between the two F layers also appears. The strength of this interaction is many times greater than the strength of the usual dipole-dipole interaction. It is mediated via Meissner currents excited in the superconductor layers by the magnon stray fields. The strength of the magnon-magnon coupling is anisotropic, and its anisotropy is opposite to the anisotropy of the magnon-photon coupling, which allows them to be separated. Both couplings become much stronger when the temperature drops below the critical temperature of the superconductor layers. It enables the implementation of an efficient tuning of the wavenumber in the S/F/I/F/S heterostructures controlled by temperature in a wide range of frequencies. Overall, the rich and tunable spectrum of S/F/I/F/S multilayers opens broad prospects for their application in magnonics.
References in corpus (20)
- Realization of XNOR and NAND spin-wave logic gates
- Current-controlled dynamic magnonic crystal
- Design of a spin-wave majority gate employing mode selection
- A spin-wave logic gate based on a width-modulated dynamic magnonic crystal
- Magnon-Fluxon interaction in a ferromagnet/superconductor heterostructure
- Spin-wave logic devices based on isotropic forward volume magneto-static waves
- Electric-field coupling to spin waves in a centrosymmetric ferrite
- Quantum amplification and simulation of strong and ultrastrong coupling of light and matter
- Skyrmion-(Anti)Vortex Coupling in a Chiral Magnet-Superconductor Heterostructure
- Observation and control of hybrid spin-wave-Meissner-current transport modes
- Magnetization dynamics in proximity-coupled superconductor/ferromagnet/superconductor multilayers
- Approaching to the deep-strong photon-to-magnon coupling
- Ultrastrong magnon-photon coupling and entanglement in superconductor/ferromagnet nanostructures
- Magnon-Cooparons in magnet-superconductor hybrids
- Giant demagnetization effects induced by superconducting films
- Temperature-sensitive spin-wave nonreciprocity induced by interlayer dipolar coupling in ferromagnet/X (X=paramagnet, superconductor) hybrid systems
- Dynamic control of spin wave spectra using spin-polarized currents
- Renormalization of antiferromagnetic magnons by superconducting condensate and quasiparticles
- Stacking order-dependent sign-change of microwave phase due to eddy currents in nanometer-scale NiFe/Cu heterostructures
- Antiferromagnetic resonances in superconductor-ferromagnet multilayers