Year: 2026
Type: preprint
Abstract: The dataset consist of the data used to prepare the figures for the manuscript: Anton Pokusinskyi, Paweł Gruszecki, Julia Kharlan, Oleksandr Dobrovolskiy, and Jarosław W. Kłos "Higher-harmonic spin-wave excitation by a superconducting antenna with vortices". Abstract: The interaction between superconductivity and magnetism provides new routes for controlling nonlinear excitations in hybrid systems. While dc-driven Abrikosov vortices (fluxons) are known to interact with spin waves, the ability of confined, nearly harmonic vortex oscillations to generate higher-frequency spin-wave modes remains unexplored. Here, by combining time-dependent Ginzburg–Landau modeling with spectral analysis of the microwave near field, we demonstrate second-harmonic spin-wave excitation driven by a superconducting microstrip antenna in the Shubnikov state. Unlike conventional harmonic-generation mechanisms associated with nonlinear magnetization dynamics, the magnetic layer remains a linear receiver, whereas the superconducting antenna generates the nonlinear microwave field. We show that nearly sinusoidal vortex motion and the accompanying redistribution of superconducting screening currents produce higher harmonics that couple to spin-wave modes. This response arises from spatial-to-temporal transduction, whereby harmonic vortex motion and the associated redistribution of screening currents convert a spatially nonuniform magnetic-field profile into higher temporal harmonics. Magnetic flux quanta thus act as active nonlinear elements for frequency conversion, extending the accessible spin-wave frequency range in superconducting–magnonic hybrids. The dataset contains magnetic field distributions calculated 5 nm below a Pb superconducting film using time-dependent Ginzburg–Landau simulations. Three film configurations are included: a pristine Pb film, a film with point defects, and a film with antidot (hole-like) defects, representing different pinning strengths. The simulations were performed under an external magnetic field of 30 mT applied out of plane and are intended for modelling a superconducting antenna for spin-wave excitation.An example of how to read and handle the .h5 file structure is provided in the reader.ipynb notebook.
Source: arXiv (Cornell University)
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7221036624