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Superconducting and magnetic properties of Ba2LnCu3O7−x compounds (Ln=lanthanides)

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Zeitschrift für Physik B Condensed Matter

Abstract

The superconducting and magnetic properties of a series of compounds Ba2LnCu3O7−x (Ln=Pr, Nd, Sm ... Gd, Dy ... Yb) are reported and compared with corresponding measurements on the isostructural model substance Ba2YCu2O7−x . The unknownx in the oxygen concentration is obviously responsible for a nonmonotonic variation of bothT c and the lattice constants with the rare-earth size. No remarkable increase ofT c was achieved on replacing Y by a magnetic Ln. A partial substitution of Ba by Sr reducedT c, but increasedT N of Ba2GdCu3O7−x from 2.3 K to 2.65 K in BaSrGdCu3O7−x . Intrinsic pinning effects in external magnetic fields appear to be surprisingly weak at higher temperatures where technical applications of this sort of superconductors might be of interest.

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Authors and Affiliations

  1. Laboratorium für Festkörperphysik, ETH-Hönggerberg, CH-8093, Zürich, Switzerland

    F. Hulliger & H. R. Ott

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  1. F. Hulliger
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  2. H. R. Ott
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Hulliger, F., Ott, H.R. Superconducting and magnetic properties of Ba2LnCu3O7−x compounds (Ln=lanthanides). Z. Physik B - Condensed Matter 67, 291–298 (1987). https://doi.org/10.1007/BF01307251

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  • DOI: https://doi.org/10.1007/BF01307251

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