T. Prikhna, W. Gawalek, Y. Savchuk, A. Mamalis, V. Tkach, H. W. Weber, T. Habisreuther, M. Eisterer, F. Karau, M. Wendt, N. Sergienko, V. Moshchil, A. Kozyrev, P. Nagorny, C. Schmidt, V. Melnikov, J. Dellith, D. Litzkendorf, J. Noudem, X. Chaud, V. Sverdun, A. Shapovalov, A. Starostina:
"High pressure synthesized magnesium diboride- and dodecaboride-based superconductors: structure and properties";
Materials Science Forum, 670 (2011), S. 21 - 27.

Kurzfassung englisch:
The critical current density, jc, of high-pressure synthesized MgB2-based balk materials
correlates with the amount and distribution of higher borides (MgB12) and Mg-B-O inclusions,
which in tern correlates with the synthesis temperature and presence of additions (Ti, Ta, SiC).
High-pressure-synthesized materials with near MgB12 composition of matrix exhibited
superconducting transition temperature, Tc, of about 37 K, rather high jc (5·105 and 103 A/cm2 in 0 T
and 3.5 T, respectively, at 20 K) and doubled matrix microhardness: 25±1.1 GPa at 4.9 N -load as
compared to materials with MgB2).

MgB2-based bulk superconductor; high-pressure synthesis; MgB12, critical current density, microhardness, Ta, Ti, SiC additions, Mg-B-O inclusions

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