The effect of high-pressure synthesis on flux pinning in MgB 2-based superconductors

Tatiana Prikhna, Wolfgang Gawalek, Michael Eisterer, Harald W. Weber, Mykola Monastyrov, Vladimir Sokolovsky, Jacques Noudem, Viktor Moshchil, Myroslav Karpets, Valeriy Kovylaev, Alexandr Borimskiy, Vasiliy Tkach, Artem Kozyrev, Roman Kuznietsov, Jan Dellith, Christa Shmidt, Doris Litzkendorf, Friedrich Karau, Ulrich Dittrich, Michael Tomsic

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Increasing the pressure during manufacturing MgB 2 enhances the volume pinning force and moves the position of the maximum to higher magnetic fields. A similar shift was observed when Ti or SiC was added and the maximum of the volume pinning force was found at higher fields in in situ synthesized materials than in ex situ sintered samples. We attribute the observed changes to Mg-B-O oxygen-enriched regions and grains of higher magnesium borides in the MgB 2 matrix. High-temperature processed materials demonstrated mainly point or mixed pinning while grain boundary pinning dominated after low-temperature synthesis.

Original languageEnglish
Pages (from-to)111-114
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume479
DOIs
StatePublished - 1 Sep 2012

Keywords

  • Critical current density
  • Higher magnesium borides
  • Magnesium diboride
  • Pinning centers
  • Pinning force

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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