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2004 | 105 | 3 | 287-294
Article title

Oxygen Deficient YBa_2Cu_3O_{7-δ}: Two Superconducting Phases

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Abstracts
EN
A set of oxygen deficient powder and granular samples of YBa_2Cu_3O_{7-δ} ceramics was studied by means of thermogravimetric and magnetically modulated microwave absorption methods. Especially the last method has turned out to be a powerful method, which was used to determine the dependence of critical temperature T_c on the oxygen parameterδ. Using these methods it has been shown that the removing of oxygen evokes the inhomogeneous oxygen distribution in the samples and a change in carrier concentration till to the loss of superconducting properties. A superconducting phase with T_c=60 K, which occurs in oxygen deficient YBa_2Cu_3O_{7-δ} sample, is an unstable phase.
Keywords
Contributors
author
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
  • Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, Narutowicza 11/12, 80-952 Gdańsk, Poland
author
  • Department of Inorganic Chemistry, Faculty of Natural Sciences Comenius University, 842 15 Bratislava, Slovakia
References
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Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv105n303kz
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