Scaling behaviour of rf surface resistance in oxygen deficient single-domain YBCO

Abstract

To develop high-quality rf components for wireless telecommunications, we have processed single-domain YBCO of various dimensions and geometry for the device applications including high-Q resonators and filters. In this development, a critical parameter, the surface resistance, R s , of single-domain YBCO has been measured in wide ranges of temperature and magnetic field. We have found that the Pippard model can best describe the well oxygenated crystal, indicating the high-quality of single-domain YBCO. However, such scaling breaks down when the oxygen structural disorders are introduced into the sample. A fundamentally different scaling behaviour is observed, which is closely related to the structural defects of oxygen. We report such a behaviour and discuss the possible underlying mechanism.

Frequency and temperature dependence of ac loss and scaling study of a high-temperature cuprate superconductor

“…It is seen that all the data (for different frequencies) below T C merged on a common curve and above the T C scaling does not occur. The scaling nature of the normalized parameter against the reduced temperature has been reported by Qu et al [41].…”

Interface structure of YBa2Cu3Ox thin films prepared by a non-fluorine sol$ndash$gel route on a single-domain substrate

“…Although there have been limited data on the surface resistance of single-domain YBCO, our preliminary experiments have shown quite promising results in this material. As has been reported, the surface resistance of the single-domain YBCO measured at 77 K and 0.8 GHz has reached 0.05 m indicating an extremely low value comparable to those of thin films [10][11][12]. Such a low surface resistance satisfies the basic requirement in the development of the receiver component.…”

“…For the precursor solution, stoichiometric (1:2:3) yttrium trimethylacetate, barium hydroxide and copper trimethylacetate powders were dissolved in a mixed propionic acid/amine solvent with an oxide concentration between 0.1 and 0.5 mol l −1 . The addition of amine was important because [ [10][11][12][13][14]. The YBCO substrates were sectioned from a large single-domain material ceramic that was 20 mm in diameter.…”