"We report on microwave measurements on DyBa(2)Cu(3)O(7-delta), monodomains grown by the top-seeded melt-textured technique. We measured the field increase of the surface resistance R(s)(H) in the a-b plane at 48.3 GHz. Measurements were performed at fixed temperatures in the range 70 K-T(c) with a static magnetic field mu(0)H < 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 R(s)(H) is ascribed to the dissipation caused by vortex motion. The analysis of X(s)(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 YBa(2)Cu(3)O(7-delta) with nanometric BaZrO(3) inclusions. (C) 2011 Elsevier B.V. All rights reserved."
Pompeo, N., Rogai, R., Ausloos, M., Cloots, R., Augieri, A., Celentano, G., et al. (2011). Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems. PHYSICA. C, SUPERCONDUCTIVITY, 471(21-22), 854-858 [10.1016/j.physc.2011.05.073].
Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems
POMPEO, NICOLA;SILVA, Enrico
2011-01-01
Abstract
"We report on microwave measurements on DyBa(2)Cu(3)O(7-delta), monodomains grown by the top-seeded melt-textured technique. We measured the field increase of the surface resistance R(s)(H) in the a-b plane at 48.3 GHz. Measurements were performed at fixed temperatures in the range 70 K-T(c) with a static magnetic field mu(0)H < 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 R(s)(H) is ascribed to the dissipation caused by vortex motion. The analysis of X(s)(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 YBa(2)Cu(3)O(7-delta) with nanometric BaZrO(3) inclusions. (C) 2011 Elsevier B.V. All rights reserved."I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
