The parallel plate resonator method has been used for measuring high quality YBa2Cu3O7-x (YBCO) thin films. The surface resistance and the real part of the conductivity show a non-monotonic behaviour with a broad peak around 45 K. The penetration depth and the real part of the conductivity vary linearly at low temperatures. The lowest penetration depth linear fitting has a slope value of 2.2 to 2.5 angstrom/K up to 20 K which is lower than previous measurements on YBCO single crystals. An interpretation of this smaller slope in terms of the generally accepted d-wave order parameter symmetry presents difficulties.
|Number of pages||4|
|Journal||Physica C: Superconductivity and its Applications|
|State||Published - May 1999|
|Event||Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors - Crete, Greece|
Duration: 26 Sep 1998 → 3 Oct 1998