Enhancement of the critical current density in FeO-coated MgB2 thin films at high magnetic fields

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Surdu A. E. , Hamdeh H. H. , Al-Omari I. A. , Sellmyer D. J. , Socrovisciuc A. V. , Prepelita A. A. , ...More

BEILSTEIN JOURNAL OF NANOTECHNOLOGY, vol.2, pp.809-813, 2011 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 2
  • Publication Date: 2011
  • Doi Number: 10.3762/bjnano.2.89
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.809-813


The effect of depositing FeO nanoparticles with a diameter of 10 nm onto the surface of MgB2 thin films on the critical current density was studied in comparison with the case of uncoated MgB2 thin films. We calculated the superconducting critical current densities (J(c)) from the magnetization hysteresis (M-H) curves for both sets of samples and found that the J(c) value of FeO-coated films is higher at all fields and temperatures than the J(c) value for uncoated films, and that it decreases to similar to 10(5) A/cm(2) at B = 1 T and T = 20 K and remains approximately constant at higher fields up to 7 T.