Study of superconducting properties of oxygen deficient GdBa2Cu3O7-y by a heating cycle technique

Herng-Er Horng, J. C. Jao, M. H. Hsieh, Hong-Chang Yang, B. C. Yao, C. H. Chen

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Abstract

We have studied oxygen deficient GdBa2Cu3O7-y samples by heating cycle technique and correlated the resistivity data with the oxygen deficiency derived from TGA. An orthorthombic to tetragonal phase transformation was found at about 720 K and it is consistent with that derived from the X-ray data. The resistivity is hysteretic cooling and shows semiconducting behavior for y≥0.7. Localization was found for samples with semiconductive properties. The electron-phonon coupling constant derived from the electric and magnetic measurements is λtr=0.31 which suggests a weak electron-phonon coupling in high-Tc oxides.

Original languageEnglish
Pages (from-to)480-484
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume158
Issue number3
DOIs
Publication statusPublished - 1989 May 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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