Transport studies on nanometer thick YBa2Cu3O7-δ multilayers using Y0.4Pr0.6Cu3o7 and PrBa2(cu0.8Ga0.2)3O7 as buffer layers

Ke Wu, Udom Tipparach, Tar Pin Chen, Qi Li, X. H. Zeng, E. Wert, John L. Wagner, Quark Y. Chen, J. T. Wang, Hong Chang Yang, Herng Er Horng

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We have fabricated PrBa2[Cu1-xGax]3O7 (PBGCO) ceramic samples for x = 0.05, 0.10, 0.15 and 0.20. The electrical resistivities of these samples are many orders of magnitude higher than that of PrBa2Cu3O7 (Pr123) while the other physical properties remain much the same. PBGCO therefore may be a possible buffer layer for YBa2Cu3O7-δ (Y123) superlattices/multilayers. For this reason YBa2Cu3O7-δ/PrBa2 (Cu0.8Ga0.2)3O7 (Y123/PBCGO) and YBa2Cu3O7-δ/Y0.4 Pr0.6Ba2Cu3O7 (Y123/YPBCO) superlattices were fabricated and their transport properties were studied. It is found that although PBGCO is better for insulating Y123 films in trilayers, inter-Y123 layer coupling exists between separated Y123 layer.

Original languageEnglish (US)
Pages (from-to)3317-3322
Number of pages6
JournalInternational Journal of Modern Physics B
Issue number24-25
StatePublished - Oct 10 2001

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

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