Enhanced critical currents by CeO2 additions in directionally solidified YBa2Cu3O7

DOI PDF 被引用文献7件
  • S. Piñol
    Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya, Spain
  • F. Sandiumenge
    Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya, Spain
  • B. Martínez
    Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya, Spain
  • V. Gomis
    Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya, Spain
  • J. Fontcuberta
    Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya, Spain
  • X. Obradors
    Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Catalunya, Spain
  • E. Snoeck
    Centre d’Elaboration de Materiaux et d’Etudes Structurales, CNRS, 29 rue Jeanne Marvig, 31055 Toulouse, Cedex, France
  • Ch. Roucau
    Centre d’Elaboration de Materiaux et d’Etudes Structurales, CNRS, 29 rue Jeanne Marvig, 31055 Toulouse, Cedex, France

書誌事項

公開日
1994-09-12
DOI
  • 10.1063/1.112011
公開者
AIP Publishing

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説明

<jats:p>The microstructure and critical currents of superconducting YBa2Cu3O7-Y2BaCuO5 composites with small CeO2 additions prepared using a directional solidification procedure have been investigated. The small CeO2 additions cause the decomposition of the Y2BaCuO5 phase leading to the formation of Y2O3 and BaCeO3. Experimental evidence is given for the subsequent nucleation of the Y2BaCuO5 phase on the Y2O3 particles. This new decomposition-nucleation mechanism leads to textured YBa2Cu3O7 having enhanced critical currents. An addition of 0.3 wt % CeO2 can increase Jabc by a factor of 2 in samples having similar concentration of Y2BaCuO5 precipitates. Critical currents above 105 A/cm2 at 77 K and zero field are obtained by this method.</jats:p>

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