Microstructure and trapped field of Al-doped GdBCO-Ag bulk superconductors

D. Volochova, P. Diko, S. Piovarci, M. Kalmanova, K. Iida, B. Holzapfel, A. E. Carrillo, B. Bozzo, X. Granados

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    3 Citations (Scopus)

    Abstract

    The effect of Gd 2Ba 6Al 4O 15 powder addition on microstructure, field trapping capability and critical transition temperature, T c, of GdBCOAg superconductors grown in air is reported. Single-grain GdBCO-Ag bulk superconductors with different amounts of Gd 2Ba 6Al 4O 15powder were fabricated by the top seeded melt growth process. Addition of 0.3wt% Gd 2Ba 6Al 4O 15 powder increased the maximum trapped field value, B Zmax. Microstructure analysis confirmed that, up to 1.0wt% addition of this powder, Al-based phase is not formed and Al is supposed to substitute Cu in the GdBa 2Cu 3O 7-δ matrix. Addition of 2.0wt% Gd 2Ba 6Al 4O 15 powder leads to formation of Pt,Al-based phase, which indicates that the solubility limit of Al in the studied system was exceeded. The critical transition temperature, T c, decreases monotonically with increasing Gd 2Ba 6Al 4O 15 powder addition. © 2012 IOP Publishing Ltd.
    Original languageEnglish
    Article number025023
    JournalSuperconductor Science and Technology
    Volume25
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2012

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