Microwave surface resistance of epitaxial YBa/sub 2/Cu/sub 3/O/sub 7-x/ films: studies on oxygen deficiency and disordering

The authors have studied the microwave surface resistance R/sub S/ at 19 GHz of epitaxial YBa/sub 2/Cu/sub 3/O/sub 7-x/ films prepared by high oxygen pressure DC-sputtering on NdGaO/sub 3/ and LaAlO/sub 3/ substrates. Oxygen deficiency x, O >