Superconducting Properties of Ag and Sb Substitution on Low-Density YBa2Cu3O δ Superconductor

  • H. Azhan
  • F. Fariesha
  • S. Y. S. Yusainee
  • K. Azman
  • S. Khalida
Original Paper


The effects of silver (Ag) and antimony (Sb) substitution on low-density YBa2Cu3O δ (YBCO) superconductor were investigated. Two series of sample with a nominal composition of YBa2−x Ag x Cu3O δ and YBa2−x Sb x Cu3O δ where x=0.05, 0.10, 0.15, 0.20, 0.30, 0.40 and 0.50 were synthesized and characterized. All Ag-doped samples showed metallic behavior at the normal state and T C onset was found at 90 K. T C zero decreased as the Ag concentration increased. Optimum Ag concentration was achieved at x=0.20 where T C zero has the highest value of 87 K and J C at 70 K is 16.50 A/cm2. For Sb-doped case with x≤0.30, the samples showed metallic behavior above T C onset while semiconducting behavior was shown for x≥0.40. The optimum Sb concentration was achieved at x=0.15 where T C zero is 85 K and J C value measured at 70 K is 2.75 A/cm2. T C onset and T C zero were found to decrease toward higher Sb concentration. The crystallographic structure transformed to tetragonal in Sb-doped samples of x≥0.30 while other samples remain orthorhombic.


Superconductor YBCO Ag-doped Sb-doped 



The authors wish to thank the Ministry of Higher Education (MOHE) Malaysia through Exploratory Research Grant Scheme (ERGS) for the financial support.


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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • H. Azhan
    • 1
  • F. Fariesha
    • 2
  • S. Y. S. Yusainee
    • 3
  • K. Azman
    • 1
  • S. Khalida
    • 4
  1. 1.Faculty of Applied SciencesUniversiti Teknologi MARA PahangBandar JengkaMalaysia
  2. 2.Faculty of Applied SciencesUniversiti Teknologi MARA PerakTapah RoadMalaysia
  3. 3.Faculty of Applied SciencesUniversiti Teknologi MARAShah AlamMalaysia
  4. 4.International Education College (INTEC)Shah AlamMalaysia

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