P. Diko, V. Antal, M. Kanuchova, M. Sefcikova, J. Kovac, X. Chaud, M. Eisterer, N. Hörhager, M. Zehetmayer, H. W. Weber:
"Influence of thermochemical treatments on TSMG YBCO bulks doped with Li and Al.";
Journal of Physics: Conference Series, 234 (2010), 012011; S. 1 - 7.

Kurzfassung englisch:
The influence of post-growth thermochemical treatments on the transition
temperature and the field dependence of the critical current density at 77 K were studied in
Y1.5Ba2(Cu,M)3Oy, for M = Li, and Al, bulk superconductors with CeO2 additions prepared by
the Top-Seeded Melt-Growth (TSMG) process. The Li and Al dopants react in an opposite way
during pre-annealing in an atmosphere with low and high oxygen partial pressure and this
behaviour can be associated with the formation and dissolution of dopant clusters. High
pressure high temperature oxygenation preserves the peak effect introduced by the dopants and
leads to the elimination of oxygenation cracks and consequently to significant increases in the
effective critical current density.

Elektronische Version der Publikation:

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