In this work, we study magnetization dynamics in superconductor-ferromagnet (S-F) thin-film multilayer. Theoretical considerations supported by the broad-band ferromagnetic resonance spectroscopy reveal development of acoustic and optic resonance modes in S-F multilayers at significantly higher frequencies in comparison to the Kittel mode of individual F-layers. These modes are formed due to antiferromagnetic-like interaction between F-layers via shared circulating superconducting currents in S-layers. The gap between resonance modes is determined by the thickness and superconducting penetration depth in S-layers. Overall, rich spectrum of S-F multilayers and its tunability opens wide prospects for application of these multialyers in magnonics as well as in various superconducting hybrid systems.
@article{arxiv.2303.05175,
title = {Antiferromagnetic resonances in superconductor-ferromagnet multilayers},
author = {I. A. Golovchanskiy and V. V. Ryazanov and V. S. Stolyarov},
journal= {arXiv preprint arXiv:2303.05175},
year = {2023}
}