Abstract
High-quality YBaCuO films are used to sequentially prepare a 10-GHz disk resonator and a planar inductance coil. The Q factor of the planar inductance coil at its resonance frequency (64 MHz) is much higher than the values reported for analogous structures. The measurement results are used to estimate the surface resistance of the films at frequencies of 10 GHz and 64 MHz. The surface resistance measured at 64 MHz is more than fourfold of that calculated from the surface resistance measured at 10 GHz by the dependence R sur ∼ ω2. Our analysis demonstrates that extrinsic factors cannot substantially affect the measurement results; therefore, the deviation from the R sur ∼ ω2 dependence in the megahertz range is determined by the intrinsic properties of the superconducting strip.
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