Fig. 1: Experimental set up.
From: Moving Abrikosov vortex lattices generate sub-40-nm magnons
a, The experimental geometry. The superconductor/ferromagnet hybrid structure consists of a Nb–C superconducting strip, stray field coupled to a Co–Fe magnonic conduit. Measurements are taken at 4.2 K in a magnetic field Hext directed at a small-angle \({\beta}\approx{5}^{\circ}\) concerning the z axis in the x–z plane. b, A schematic of the excitation of magnons by the moving vortex lattice. c, A scanning electron microscopy image of the microwave ladder antenna, before the deposition of the Co–Fe conduit, used for the detection of magnons with wavelengths \({\lambda}_{\rm{SW}}\approx36{\rm{nm}}\) (wavevectors kSW ≈ 175 rad \({{{\upmu}}{\rm{m}}}^{-1}\)).
