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Phase Relationships and Cation Disorder in RE1+xBa2-xCu3O7+δ, RE = Pr, Nd, Sm, Gd

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Advances in Superconductivity VIII

Abstract

Unlike Y123 which forms only a stoichiometric compound, the light rare earth elements (LRE) form a solid solution LRE1+xBa2-xCu3O7+δ (LRE123ss), with increasing substitution of the LRE3+ for the Ba2+ as the ionic radii of the LRE increases. The sub-solidus phase relationships around the LRE123ss change for La, Pr and Nd, but are similar for Sm and Gd. However, the solubility limit decreases with decreasing ionic radii. In addition, the solubility limits for Sm and Gd are strongly influenced by PO2 during high temperature annealing. The range of solubility is, for any given LRE system, strongly dependent on the oxygen partial pressure(PO2) providing a new means by which to control the microstructure in the RE123 system.

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Author information

Authors and Affiliations

  1. Ames Laboratory, Iowa State University, Ames, IA, 50011, USA

    M. J. Kramer, H. Wu, K. W. Dennis, B. I. Polzin, D. K. Falzgraf & R. W. McCallum

  2. Department of Materials Science and Engineering, Iowa State University, Ames, IA, 50011, USA

    H. Wu & R. W. McCallum

Authors
  1. M. J. Kramer
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  2. H. Wu
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  3. K. W. Dennis
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  4. B. I. Polzin
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  5. D. K. Falzgraf
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  6. R. W. McCallum
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Editors and Affiliations

  1. Department of Electronics, Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-01, Japan

    Hisao Hayakawa

  2. Superconductivity Research Laboratory, ISTEC, Koto-ku, Tokyo, 135, Japan

    Youichi Enomoto

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© 1996 Springer Japan

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Kramer, M.J., Wu, H., Dennis, K.W., Polzin, B.I., Falzgraf, D.K., McCallum, R.W. (1996). Phase Relationships and Cation Disorder in RE1+xBa2-xCu3O7+δ, RE = Pr, Nd, Sm, Gd. In: Hayakawa, H., Enomoto, Y. (eds) Advances in Superconductivity VIII. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66871-8_84

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  • DOI: https://doi.org/10.1007/978-4-431-66871-8_84

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-66873-2

  • Online ISBN: 978-4-431-66871-8

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