http://www.cnr.it/ontology/cnr/individuo/prodotto/ID58342
Evidence for low-field crossover in the vortex critical velocity of type-II superconducting thin films (Articolo in rivista)
- Type
- Label
- Evidence for low-field crossover in the vortex critical velocity of type-II superconducting thin films (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.82.024512 (literal)
- Alternative label
Grimaldi, G; Leo, A; Zola, D; Nigro, A; Pace, S; Laviano, F; Mezzetti, E (2010)
Evidence for low-field crossover in the vortex critical velocity of type-II superconducting thin films
in Physical review. B, Condensed matter and materials physics
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Grimaldi, G; Leo, A; Zola, D; Nigro, A; Pace, S; Laviano, F; Mezzetti, E (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://link.aps.org/doi/10.1103/PhysRevB.82.024512 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CNR - SPIN Salerno
Dipartimento di Fisica \"E.R. Caianiello\", Università di Salerno (literal)
- Titolo
- Evidence for low-field crossover in the vortex critical velocity of type-II superconducting thin films (literal)
- Abstract
- We measure current-voltage characteristics as function of magnetic field and temperature in Nb strips of different thickness and width. The instability voltage of the flux-flow state related to the vortex critical velocity v* is studied and compared with the Larkin-Ovchinnikov theory. Beside the usual power-law dependence v*=B-1/2, in the low-field range a new crossover field, Bcr1, is observed below which v* decreases by further lowering the external magnetic field B. We ascribe this unexpected crossover to vortex channeling due to a fanlike penetration of the applied magnetic field as confirmed by magneto-optic imaging. The observation of Bcr1 becomes a direct evidence of a general feature in type-II superconducting films at low fields that is a channel-like vortex motion induced by the inhomogeneous magnetic state caused by the relatively strong pinning. (literal)
- Prodotto di
- Autore CNR
Incoming links:
- Autore CNR di
- Prodotto
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi