Effect of Nanostructural Inhomogeneities on the Superconducting Characteristics of $\hbox {MgB} _ {2} $ With Enhanced Grain Connectivity Academic Article uri icon

abstract

  • Abstract: MgB 2-based bulk materials synthesized under 30 MPa-2 GPa pressure demonstrated an enhanced connectivity AF~ 50%-98%, as compared tomostother reports (below50%), and a shielding fraction of 75%-100%. The materials inhibit high critical current densities jc, but no strict correlation was found between AF and j c. On the other side, we found correlations between jc and the distribution of nanostructural inhomogeneities such as impurity oxygen in the form of oxygen-enriched Mg-BO nanolayers or nanoinclusions and …

publication date

  • June 1, 2015