Our paper on “Coherent coupling between YBCO superconducting resonators and sub-micrometer-thick YIG films” is finally on-line on Journal of Magnetism and Magnetic Materials at this page, as a part of the Special Issue “Trends in Magnetism: Selected Papers from the International Conference on Magnetism 2024 (ICM 2024)“.

a,b) geometry investigated in the paper, in which the YBCO-YIG bilayer is obtained. Both coplanar waveguides and coplanar resonators are considered. c) Transmission of the bilayer for different temperatures at fixed static magnetic field. d) Transmission map of the bilayer as a function of the static magnetic field taken at 30 K. Two magnonic modes are visible in the transmission of the waveguide.

Abstract: “In cavity magnonics, magnon–photon hybridization has been widely investigated for both fundamental studies and applications. Planar superconducting resonators operating at microwave frequencies have demonstrated the possibility to achieve high couplings with magnons by exploiting the confinement of the microwave field in a reduced volume. Here we report a study of the coupling of high-Tc YBCO superconducting waveguides with 104-nm-thick YIG magnetic films. We study the evolution of mode frequencies as a function of temperature and extract the coupling strength of hybrid magnon–photon modes. We show that the experimental results can be reproduced using a simple model in which the temperature dependence of the penetration depth accounts for the evolution of the polaritonic spectrum.“

NEW PAPER! Coherent coupling between YBCO superconducting resonators and sub-micrometer-thick YIG films