Magnetic properties of polycrystalline PrxY1-xBa2Cu3 O7-δ

C. Stari, V. A.G. Rivera, A. J.C. Lanfredi, C. A. Cardoso, E. R. Leite, A. W. Mombrú, F. M. Araujo-Moreira

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Abstract

In this work, we report a part of a systematic study of the influence of the synthesis routes on the properties of polycrystalline samples of PrxY1-xBa2Cu3 O7-δ. We have prepared high-quality samples of this material by following a sol-gel method, associated with heat treatment in both an inert argon and an oxygen atmospheres in order to compare their influence on the formation of the superconducting phase. Magnetic measurement (AC susceptibility) show that the superconducting transition temperature (TC) increases in samples prepared in argon when compared to those prepared in oxygen, for the same composition and Pr fraction less than 0.5. In addition to this, preliminary results of AC and DC magnetic susceptibility show superconductivity for samples with Pr fraction higher than 0.5 (and up to 0.9) prepared under argon flux, which may indicate the existence of stable superconductivity for all compositions, including pure Pr-123.

Original languageEnglish
Pages (from-to)e504-e506
JournalJournal of Magnetism and Magnetic Materials
Volume320
Issue number14
DOIs
StatePublished - Jul 2008

Bibliographical note

Funding Information:
The authors gratefully acknowledge Brazilian agencies CNPq, CAPES and FAPESP for financial support. C.S. thanks CAPES (IEL Nacional—Brazil) for the fellowship.

Keywords

  • PrBaCuO
  • Superconductivity

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