We report on microwave measurements on DyBa2Cu3O7-δmonodomains grown by the top-seeded melt-textured technique. We measured the field increase of the surface resistance Rs(H) in the a-b plane at 48.3 GHz. Measurements were performed at fixed temperatures in the range 70 K-Tcwith a static magnetic field μ0H < 0.8 T parallel to the c-axis. Low field steep increase of the dissipation, typical signature of the presence of weak links, is absent, thus indicating the single-domain behavior of the sample under study. The magnetic field dependence of Rs(H) is ascribed to the dissipation caused by vortex motion. The analysis of Xs(H) points to a free-flow regime, thus allowing to obtain the vortex viscosity as a function of temperature. We compare the results with those obtained on RE-BCO systems. In particular, we consider strongly pinned films of YBa2Cu3O7-δwith nanometric BaZrO3inclusions. © 2011 Elsevier B.V. All rights reserved.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Electronic, Optical and Magnetic Materials
Pompeo, N., Rogai, R., Ausloos, M., Cloots, R., Augieri, A., Celentano, G., & Silva, E. (2011). Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems. Physica C: Superconductivity and its Applications, 471(21-22), 854 - 858. https://doi.org/10.1016/j.physc.2011.05.073