Stable barium compounds in YBa 2 Cu 3 O y superconductors

R. Kita, K. Suzuki, T. Takeuchi, T. Iwasa, O. Miura, Y. Ichino, T. Yoshimura, Y. Yoshida, K. Yamada, Kenji Kaneko, A. Ichinose

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The stability of various amounts of Ba 3 Cu 3 In 4 O 12 (334) or BaTbO 3 (BTO) in a sintered YBa 2 Cu 3 O y (YBCO) matrix was examined. Samples with added 334 or BTO exhibited critical temperatures (T c ) above 90 K for up to 20 vol.% addition and improved critical current densities (J c ) under a magnetic field. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) analysis indicated that 334 and BTO did not react with the YBCO matrix under the sintering conditions used. The normalized J c under a magnetic field of 1 T reached a maximum at 14 vol.% of 334 addition and 20 vol.% BTO addition. YBCO thin films with added BTO showed a gradual decrease in the T c with increasing BTO content. YBCO films with added 334 showed a constant T c of 87 K up to a 334 content of 4 vol.%.

Original languageEnglish
Pages (from-to)859-862
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

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

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