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New Experimental Results Concerning the Difference Between Various TcS of LnBa2Cu3Oy (Ln=Lanthanide))

  • Tsunekazu Iwata
  • Makoto Hikita
  • Shigeyuki Tsurumi

Abstract

The superconducting properties of a sample with large ion radius lanthanide is improved by high temperature annealing. This result is considered to be due to improved atomic ordering in the sample. However, high temperature annealing causes the production of impurity phases such as BaCuCO2 Annealing in Ar atmosphere was studied to obtain single phase LnBa2Cu3Oy.

It is found that the superconducting critical temperature (T c ) of LnBa2Cu3Oy (Ln = Lanthanide) changes systematically from 88 K to 96 K depending on the melting temperature of the substance. The small changes in T c for LnBa2Cu3Oy are considered to be due to changes in its Debye temperature.

Keywords

Melting Temperature Differential Thermal Analysis Impurity Phase High Temperature Annealing Electron Probe Micro Analyzer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Japan 1989

Authors and Affiliations

  • Tsunekazu Iwata
    • 1
  • Makoto Hikita
    • 1
  • Shigeyuki Tsurumi
    • 1
  1. 1.NTT Opto-Electronics LaboratoriesTokai, Ibaraki, 319-11Japan

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