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Type: Artigo de periódico
Title: Josephson Coupling Between Superconducting Clusters In Bi2sr2cacu2o8+δ Crystals
Author: De Lima O.F.
Awana V.P.S.
Ribeiro R.A.
Avila M.A.
Abstract: Diamagnetic moments for two Bi2Sr2CaCu2O8+δ crystals were measured at different fields H and temperatures. For the higher fields two distinct transition temperatures Tg and TJ are seen, with Tg > TJ. By increasing H the line Tg(H) shifts very slowly while TJ(H) shifts much faster to lower temperatures, displaying a clear upward curvature well described by a theory based on Josephson coupling between superconducting clusters. We show further that TJ(H) is dependent on sample homogeneity, which is correlated with oxygen distribution in the high-Tc superconductors.
Rights: aberto
Identifier DOI: 10.1209/epl/i2000-00528-3
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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