Reduction of the Surface Resistance of YBa2Cu3O7-x Pellets and Thick Films by Adding Ag
- 1 July 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (7A) , L1075
- https://doi.org/10.1143/jjap.29.l1075
Abstract
This letter describes the effect of Ag addition on the surface resistance of sintered YBa2Cu3O7-x superconductors at 17 and 50 GHz. The surface resistance decreases more than 50% by adding Ag into a pellet or a thick film of YBa2Cu3O7-x . The thick film exhibits a surface resistance of 22 mΩ at 17 GHz and at 77 K, which is almost equal to that of pure Cu. It is also revealed that the surface resistance is proportional to the square of the frequency. These phenomena are discussed in terms of the effect of Ag on the morphologies and c-axis orientation of YBa2Cu3O7-x grains.Keywords
This publication has 10 references indexed in Scilit:
- Helical resonators containing high T c ceramic superconductorsApplied Physics Letters, 1989
- Observation of a narrow superconducting transition at 6 GHz in crystals of YPhysical Review B, 1988
- Epitaxial Y-Ba-Cu-O thin films prepared by rf-magnetron sputteringJournal of Applied Physics, 1988
- Superconducting Perovskites in microwave fieldsPhysica C: Superconductivity and its Applications, 1988
- High critical currents in Y-Ba-Cu-O superconductorsApplied Physics Letters, 1988
- High-
T
c
superconducting short dipole antennaElectronics Letters, 1988
- Transport critical current in rare-earth-substituted superconductors R (R=Gd, Dy, Sm, Ho, Y)Physical Review B, 1988
- Largely Anisotropic Superconducting Critical Current in Epitaxially Grown Ba2YCu3O7-y Thin FilmJapanese Journal of Applied Physics, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- Radio-Frequency Losses in the Superconducting Penetration DepthJournal of Applied Physics, 1968