A method based on a dual frequency resonator to estimate physical parameters of superconductors from surface impedance measurements in a magnetic field
arXiv:2501.11966 · doi:10.1016/j.measurement.2021.109937
Abstract
High frequency applications of superconductors in a dc magnetic field rely on the estimate of the characteristic crossover frequency between low and high losses. Customarily, high sensitivity resonant techniques, intrinsically operating at discrete frequencies, are used to estimate . We exploit here a method based on a dual frequency resonator. We show that single-frequency evaluations of lead to heavy underestimations of the superconductor surface resistance. We describe a combined analytical and experimental approach that gives more accurate estimates for , and additionally allows to test the underlying physical model.
13 pages, 9 figures, published on Measurement
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