THE MICROWAVE-ABSORPTION OF HIGH-T-C SUPERCONDUCTING THIN-FILM SAMPLES

The experimental and theoretical investigations of microwave losses (M L) in HTSC thin films are carried out. It is shown theoretically that ML in the maximum of the magnetic component B-1 are essentially larger than those in the maximum of the electric component E(1). This is bec ause eddy currents make much more substantial contribution to ML as co mpared to conventional conductivity currents. The consequence of this is the angular dependence of ML with respect to the B-1 field directio n which was experimentally observed. The angular dependences of ML wit h respect to the B-0 field direction for both low and high B-0 values were also investigated. The majority of experimental data can be well explained within the mixed model which predicts the existence of a cri tical state in inter- and intragranular Josephson medium.