Microwave studies of high-temperature superconductors
Aleksandrov V. I., Badalyan A. G. , Baranov P. G., Vikhnin V. S. , Osiko V. V., Udovenchik V. T.
Intense microwave signals in weak magnetic fields have been detected and studied in superconducting ceramics and single crystals over the frequency range 1-38 GHz, Some new anisotropic ESR signals, which appear at temperatures below 40 K, have also been detected and studied. The intensity, width, and g-factor of these new signals all increase with decreasing temperature.