V. Antal, M. Kanuchova, M. Sefcikova, J. Kovac, P. Diko, M. Eisterer, N. Hörhager, M. Zehetmayer, H. W. Weber, X. Chaud:
"Influence of Al doping and oxygenation on the superconducting properties of TSMG YBCO bulks";
Journal of Physics: Conference Series, 234 (2010), 012002; S. 1 - 5.

Kurzfassung englisch:
YBCO bulk single-grain samples with the nominal composition Y1.5Ba2(Cu1-xAlx)3Oy
were fabricated by the Top - Seeded Melt - Growth process. Aluminium was found to be a suitable
chemical dopant in Y1Ba2(Cu1-xAlx)3O7/Y2BaCuO5 bulk superconductors, which introduces
effective nanosized pinning centres. An increase of the critical current density, Jc, and the
appearance of a peak effect were observed at intermediate magnetic fields below the critical
temperature, Tc. A significant increase of the critical current density was observed in Al doped
samples after high pressure oxygenation (16 MPa oxygen pressure) at 750 °C, i.e. by a factor of 3
compared to samples subjected to standard oxygenation at 400 °C at ambient oxygen pressure.

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