From a scientific view and with respect to technical applications, the transport properties belong to the most interesting aspects of high-temperature superconductors. To its characterisation a measurement system is introduced, by which the surface impedance of the high-temperature superconductor YBaCuO in various material qualities is investigated in dependence of temperature for the linear behaviour and in dependence of the alternating field strength for nonlinearities. The properties in the linear regime can fully be described by means of a model developed within the scope of this work, which incorporates both intrinsic and material-scientific circumstances. In the nonlinear regime a scaling behaviour valid for all material qualities is found. A novel measurement technique, the detuning-dependent pulse sequence analysis, gives indications of the underlying dynamics of the nonlinearity and also of thermal influences.
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From a scientific view and with respect to technical applications, the transport properties belong to the most interesting aspects of high-temperature superconductors. To its characterisation a measurement system is introduced, by which the surface impedance of the high-temperature superconductor YBaCuO in various material qualities is investigated in dependence of temperature for the linear behaviour and in dependence of the alternating field strength for nonlinearities. The properties in the l...
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