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|Type:||Artigo de periódico|
|Title:||Josephson Coupling Between Superconducting Clusters In High-tc Materials|
|Author:||De Lima O.F.|
|Abstract:||Diamagnetic moment for Bi2Sr2CaCu2O 8+δ (Bi:2212) and YBa2Cu3O 7-δ- (Y:123) crystals were measured at different fields H and temperatures. For the higher fields two distinct transition temperatures T g and TJ are identified, with Tg > T J. By increasing H the line Tg(H) shifts very slowly while TJ(H) shifts much faster to lower temperatures, displaying an upward curvature well described by a theory based on Josephson coupling between superconducting clusters. Here, we show data mainly for the Bi:2212 crystals, where sample dependent TJ(H) lines are clearly observed. © 2001 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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