Effects of Al2O3 nano-particles on the irreversible properties of MgB2 superconductor

Kh A. Ziq*, M. Shahabuddin, I. Ansari, A. F. Salem, K. Singh, H. Kishan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Magnetic measurements on MgB2 superconductors doped with various concentration (0 < x < 0.6%) of Al2O3 nano-particles (∼20 nm) have been performed in the temperature range 4-40K and in a magnetic field of strength up to 9 Tesla. A significant increase in the irreversibility field (Hirr), critical current density (Jc) and remanent magnetization (MR) have been obtained with increasing the concentration of the Al2O3 nano-particle. At low field we have observed large vortex instabilities (known as vortex-avalanche) associated with all doped samples characterized with high critical current density. Vortex avalanche effect is reduced with increasing temperature vanishing near 20K. The results are discussed in terms of local-vortex instabilities caused by doping of Al2O3 nano-particles.

Original languageEnglish
Title of host publicationNANOTECHNOLOGY AND ITS APPLICATIONS
Subtitle of host publicationFirst Sharjah International Conference on Nanotechnology and Its Applications
Pages143-146
Number of pages4
DOIs
StatePublished - 2007

Publication series

NameAIP Conference Proceedings
Volume929
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Keywords

  • Vortex instability
  • Vortex motion

ASJC Scopus subject areas

  • General Physics and Astronomy

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