Transport property improvement by means of BZO inclusions in PLD grown YBCO thin films

Andrea Augieri, Valentina Galluzzi, Giuseppe Celentano, Achille Armenio Angrisani, Antonella Mancini, Alessandro Rufoloni, Angelo Vannozzi, Enrico Silva, Nicola Pompeo, Traian Petrisor, Lelia Ciontea, Umberto Gambardella, Sergey Rubanov

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Abstract

A detailed study on YBa2Cu3O7-6(YBCO) films with BaZro3(BZO) inclusions (YBCO-BZO) deposited on substrate with different BZO contents is presented. X ray diffraction, SEM imaging and superconductive critical temperature (Tc) measurements were performed to evaluate film growth quality. Independently from the BZO content, all YBCO-BZO films showed Tcvalues close to that of pure YBCO indicating that the Tcreduction which is usually observed on YBCO-BZO films can be successfully recovered by changing the deposition conditions. All YBCO-BZO films showed an improved critical current density (Jc) dependence on magnetic field if compared to the typical Jc(H) of YBCO, resulting in higher irreversibility fields up to 9 T at 77 K. SEM observation on etched samples suggests a direct link between the defect density measured in YBCO-BZO samples and that calculated from the observed in field performances. The analysis of Jc(B) as a function of applied magnetic field direction revealed that the pinning due to isotropic pinning centers typical for YBCO is coupled with a-axis correlated pinning in YBCO-BZO which can be ascribed to BZO induced columnar defects. Jc(B) recorded at several temperatures down to 10 K revealed matching effect features. © 2009 IEEE.
Original languageEnglish
Article number5067025
Pages (from-to)3399 - 3402
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - Jun 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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