Temperature–pressure induced nano-structural inhomogenities for vortex pinning in bulk MgB2 of different connectivity

Tatiana Prikhna,Michael Eisterer,Harald W. Weber,Wolfgang Gawalek,Valeriy Kovylaev,Myroslav Karpets,Viktor Moshchil,Artem Kozyrev, Tatiana Basyuk,Xavier Chaud,Wilfried Goldacker,Vladimir Sokolovsky,Jacques Noudem,Alexandr Borimskiy,Vladimir Sverdun,Elena Prisyazhnaya

Physica C: Superconductivity and its Applications（2014）

Cited 8|Views14

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Abstract

•We studied correlations between structure of MgB2 and SC characteristics.•B- and O-enriched inhomogeneities can act as pinning centers in bulk MgB2.•The role of point pinning increases with the increase in manufacturing temperature.•The jc increase due to O localization and decrease of sizes of B-enriched inclusions.

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Key words

Magnesium diboride,Critical current density,Connectivity,Pinning centres,Higher magnesium borides,Nanostructure

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