Unravelling the role of Cu-O chain length on the superconducting properties of SmBa(2)Cu(3)O(s+d) via Al doping and clustering
Articolo
Data di Pubblicazione:
2006
Abstract:
The superconducting properties of the SmBa2Cu3O6+δ superconductor change
dramatically upon oxidation. The driving force for these changes is still under debate because
many concomitant structural changes occur. In order to highlight the specific role of Cu-
O chain ordering on the rise of superconductivity in this system, Al-doped SmBa2Cu3O6+δ
samples have been examined, having equal aluminium and oxygen concentration and nearly
the same structure but different mean length of Cu-O chain fragments. For the first time, it is
clearly shown that, keeping all the other structural properties unchanged, the local increase of
the chain length determines a significant enhancement of the superconducting properties, i.e. TC and Meissner fraction.
dramatically upon oxidation. The driving force for these changes is still under debate because
many concomitant structural changes occur. In order to highlight the specific role of Cu-
O chain ordering on the rise of superconductivity in this system, Al-doped SmBa2Cu3O6+δ
samples have been examined, having equal aluminium and oxygen concentration and nearly
the same structure but different mean length of Cu-O chain fragments. For the first time, it is
clearly shown that, keeping all the other structural properties unchanged, the local increase of
the chain length determines a significant enhancement of the superconducting properties, i.e. TC and Meissner fraction.
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
Scavini, M.; Daldosso, M.; Cappelli, S.; Oliva, C.; Brunelli, M.; Ferrero, C.; Lascialfari, A.
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