Nanoscale Gd2BaCuO5 particles in (Sm 0.33Eu0.33Gd0.33)Ba2Cu 3Oy and magnetic levitation at 90.2 K

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Abstract

The excellent pinning performance, due to ball milled Gd 2BaCuO5 'Gd-211' particles, recently observed in (Nd, Eu, Gd)Ba2Cu3Oy, was tested with (Sm, Eu, Gd)Ba2Cu3Oy 'SEG-123' and (Nd, Sm, Gd)Ba 2Cu3Oy 'NSG-123' bulk superconductors grown by an oxygen-controlled-melt-growth process. In both cases the same effect was present. Microstructure analysis of the SEG-123 sample showed that there are two kinds of secondary phase particle: one between 100 and 200 nm and the other less than 50 nm in size. The former nanoparticles were identified as Gd-211 and Gd-rich SEG-211, the latter were either of LRE-Ba2CuZrOy or (LRE, Zr)BaCuOy. In both SEG-123 and NSG-123 the pinning performance at high temperatures was sufficient for levitation at liquid oxygen temperature (90.2 K).

Original languageEnglish
JournalSuperconductor Science and Technology
Volume18
Issue number3
DOIs
Publication statusPublished - 2005 Mar

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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