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Characterization of doped Nd-based superconductors

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Abstract

Y-, Dy-, and Gd-doped neodymium (Nd) superconductors (RE0.1Nd0.9Ba2-Cu3Oy) exhibited sharp resistivity transitions at 92 K. DC susceptibility measurements gave a common curve with diamagnetic onsets at 93 K and transitions complete at ≈50 K. Lattice constants for an assumed orthorhombic structure were calculated from X-ray diffraction measurements. These values were used to create a simulated diffraction pattern with 2θ values and relative intensities that agreed well with observed values. Oxygen contents determined by instrumental neutron activation analysis, ranged from 14.7 to 15.1±0.1 wt%(6.59≤y in O y ≤6.73). This range of oxygen content for YBa2Cu3O y gives ≈50–60 K transitions in marked contrast to the 92 K (midpoint) values for the materials of this study.

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Author notes

  1. T. N. O'Neal

    Present address: Carson-Newman College, 37760, Jefferson City, Tennessee

Authors and Affiliations

  1. Department of Chemical Engineering, University of Kentucky, 40506, Lexington, Kentucky

    W. D. Arnett, D. R. Zint & C. E. Hamrin Jr.

  2. Department of Materials Science and Engineering, University of Kentucky, 40506, Lexington, Kentucky

    R. J. De Angelis, K. Okazaki & D. K. Kim

  3. Department of Chemistry, University of Kentucky, 40506, Lexington, Kentucky

    X. X. Ding & W. D. Ehmann

  4. Department of Physics and Astronomy, University of Kentucky, 40506, Lexington, Kentucky

    J. W. Brill, T. N. O'Neal & L. E. DeLong

  5. Naval Research Laboratory, 20375, Washington DC

    M. S. Osofsky, V. Le Tourneau & S. A. Wolf

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Arnett, W.D., Zint, D.R., Hamrin, C.E. et al. Characterization of doped Nd-based superconductors. J Supercond 1, 427–440 (1988). https://doi.org/10.1007/BF00618599

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  • DOI: https://doi.org/10.1007/BF00618599

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