Effect of vortex hotspots on the radio-frequency surface resistance of superconductors
Effect of vortex hotspots on the radio-frequency surface resistance of superconductors
We present detailed experimental and theoretical investigations of hotspots produced by trapped vortex bundles and their effect on the radio-frequency (rf) surface resistance ${R}_{s}$ of superconductors at low temperatures. Our measurements of ${R}_{s}$, combined with the temperature mapping and laser scanning of a 2.36-mm-thick Nb plate incorporated into a 3.3-GHz …