Reference : Microwave properties of DyBCO monodomain in the mixed state and comparison with other...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/140301
Microwave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems
English
Pompeo, N. [Dipartimento di Fisica E. Amaldi, CNISM, Università Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy]
Rogai, R. [Dipartimento di Fisica E. Amaldi, CNISM, Università Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy]
Ausloos, Marcel [Université de Liège - ULiège > Département de physique > Département de physique >]
Cloots, Rudi [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT >]
Augieri, A. [Associazione EURATOM-ENEA, UT Fusione - Superconductivity Laboratory, Centro Ricerche Frascati, Via E. Fermi 45, 00044 Frascati (Rome), Italy]
Celentano, G. [Associazione EURATOM-ENEA, UT Fusione - Superconductivity Laboratory, Centro Ricerche Frascati, Via E. Fermi 45, 00044 Frascati (Rome), Italy]
Silva, E. [Dipartimento di Fisica E. Amaldi, CNISM, Università Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy]
2011
Physica C. Superconductivity
471
21-22
854-858
Yes (verified by ORBi)
0921-4534
1873-2143
[en] DyBCO ; Monodomain ; Surface impedance ; Vortex viscosity ; Fixed temperature ; Low field ; Magnetic field dependences ; Melt-textured ; Microwave property ; Mixed state ; Monodomains ; Nanometrics ; Single domains ; Static magnetic fields ; Vortex motion ; Weak links ; Magnetic fields ; Viscosity ; Vortex flow ; Copper
[en] We report on microwave measurements on DyBa 2Cu 3O 7-δ 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 μ 0H < 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 2Cu 3O 7-δ with nanometric BaZrO 3 inclusions. © 2011 Elsevier B.V. All rights reserved.
http://hdl.handle.net/2268/140301
10.1016/j.physc.2011.05.073

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