Microstructures and critical currents in melt-processed YBCO

H. Fujimoto, T. Taguchi, M. Murakami, N. Nakamura, N. Koshizuka

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

YBaCuO bulk superconductors prepared by the melt-powder-melt-growth process (MPMG) have a high critical current density. It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 superconducting phase can work as strong pinning centres, resulting in higher Jc values. Though 211 particles are considered to be the main pinning centres, defects such as twins and stacking faults are observed in melt-processed YBCO. In this study the effect of twin boundaries on the flux pinning was measured magnetically. The results indicate that twin planes contribute to flux pinning, but that their effect is not large in MPMG samples.

Original languageEnglish
Pages (from-to)954-958
Number of pages5
JournalCryogenics
Volume32
Issue number11
DOIs
Publication statusPublished - 1992

Keywords

  • YBCO
  • critical current density
  • flux pinning

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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    Fujimoto, H., Taguchi, T., Murakami, M., Nakamura, N., & Koshizuka, N. (1992). Microstructures and critical currents in melt-processed YBCO. Cryogenics, 32(11), 954-958. https://doi.org/10.1016/0011-2275(92)90006-V