engleski

Microwave Measurements in Thin Superconducting Films and Single Crystals

The microwave measurements were made on thin films YBa2Cu3O7-delta and single crystals of Nb. The temperature and magnetic field dependent complex conductivity was calculated from the measurements of the microwave absorption and the frequency shift. The measurements were performed for the sample positions in both magnetic and electric microwave fields and analyzed using a cavity pertubations due to a conducting sample. The frequency shift in the positions of maximum electric field shows a peak just below Tc.

superconductivity; microwave impedance; complex conductivity; thin films

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