Effect of nano ZnO doping on the nature of pinning of MgB2 superconductors

M. Shahabuddin*, Intikhab A. Ansari, Nasser S. Alzayed, Khalil A. Ziq, A. F. Salem

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The paper reports the JC(H, T) of nano-ZnO doped MgB2 samples calculated from M–H loop measurements. Volume pinning forces at different temperatures have been evaluated as a function of the field from the JC–H data. Two different scaling laws, one by Fietz and Webb and another one by M. Eisterer, are used here to analyze the pinning forces. All samples show the scaling behavior, which confirms the existence of grain boundary pinning. The XRD and R–T data show the substitution of Zn at Mg sites. The anisotropy in the sample is found to decrease with the doping of the nano-ZnO. The improvement in the JC(H, T) of the sample with the nano-ZnO doping is due to decrease in the anisotropy and increase in the volume pinning forces. The 2% nano-ZnO doping is found to be the optimal value in order to achieve the highest JC(H, T) in these samples.

Original languageEnglish
Pages (from-to)1547-1552
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Volume26
Issue number5
DOIs
StatePublished - May 2013

Bibliographical note

Publisher Copyright:
© Springer Science+Business Media New York 2012.

Keywords

  • Critical current
  • MgB
  • Nano-zinc oxide
  • Pinning force
  • Scaling and anisotropy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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