Moving Abrikosov vortex lattices generate sub-40-nm magnons.

ABSTRACT: Magnons, the quasi-particles of spin waves, are promising candidates for developing wave-based computing and hybrid quantum technologies. However, generating short-wavelength magnons through microwave excitation becomes increasingly challenging because the excitation efficiency decreases as the antenna size shrinks. Here we demonstrate an alternative approach and generate magnons in a Co-Fe strip using magnetic flux quanta, that is, Abrikosov vortices, moving in an adjacent Nb-C superconductor at velocities exceeding 1 km s^-1. The moving vortex lattice acts on the magnetic layer via both static and dynamic stray fields. Our experiments showcase the unidirectional excitation of sub-40-nm wavelength magnons and their coherent interaction with the moving vortices. In turn, the Nb-C

SUBMITTER: Dobrovolskiy OV 

PROVIDER: S-EPMC12727539 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature