English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

The influence of two important features of magnesium diboride on themacroscopic transport properties of polycrystalline MgB2 is discussed in theframework of a percolation model. While two band superconductivity does nothave significant consequences in the field and temperature range of possiblepower applications, the opposite is true for the anisotropy of the uppercritical field. The field dependence of the critical current densities stronglyincreases and the macroscopic supercurrents disappear well below the apparentupper critical field. The common scaling laws for the field dependence of thevolume pinning force are altered and Kramer's plot is no longer linear,although grain boundary pinning dominates in nearly all polycrystalline MgB2conductors. In contrast to the conventional superconductors NbTi and Nb3Sn, asignificant critical current anisotropy can be induced by the preparationtechnique of MgB2 tapes.

Consequences of the peculiar intrinsic properties of MgB2 on its macroscopic current flow