Polycrystalline YBa 2 Cu 3 O 7-δ with nano-sized Al 2 O 3 inclusions

B. A. Albiss, N. Al-Rawashdeh, Alaa Abu Jabal, M. Gharaibeh, I. M. Obaidat, M. K. Hasan, K. A. Azez

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16 Citations (Scopus)


Series of (YBa 2 Cu 3 O 7-δ ) 1-x (Al 2 O 3 ) x samples have been prepared using solid state reaction method. Various amount of nano-sized Al 2 O 3 particles (∼50 nm) were added with (x=0, 0.005, 0.01, 0.02, and 0.05). The microstructure and the morphology of the polycrystalline samples have been characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The magneto-transport properties of these samples were investigated using resistance-temperature (R-T) and current-voltage (I-V) characteristics. All samples showed an orthorhombic structure with a tendency to transformation to tetragonal phase at higher levels of nanoparticles addition. The morphology of the surface of pure samples reveals a considerable number of weak-links, randomly oriented and clean grain boundaries. While in samples with nano inclusions, grain boundaries were filled with nanosized particle and have less number of weak-links. Significant enhancement of the superconducting critical current density J c in applied magnetic field was observed due to nano Al 2 O 3 inclusions. However, further increase in the value of x decreases the transition temperature T c and the critical current density J c . These results were interpreted in terms of the flux pinning mechanisms in granular superconducting networks which leads to a better basic understanding of the performance of YBCO system in high applied magnetic fields.

Original languageEnglish
Pages (from-to)1333-1340
Number of pages8
JournalJournal of Superconductivity and Novel Magnetism
Issue number7
Publication statusPublished - Oct 2010


  • Atomic force microscopy
  • Critical current density
  • X-ray diffraction
  • YBCO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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