Enhanced Tc and strong flux pinning in melt-processed NdBa2Cu3Oy superconductors

Sang Im Yoo, Masato Murakami, Naomichi Sakai, Takamitsu Higuchi, Shoji Tanaka

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162 Citations (Scopus)

Abstract

The effects of various oxygen partial pressures (PO2) during melt processing on the superconducting properties of fabricated NdBa2Cu3Oy (Ndl23) superconductors have been systematically investigated. Unlike in air or O2samples melt-processed in reduced oxygen atmospheres exhibited unprecedentedly high Tc’s of 95–96 K with a sharp superconducting transition. Especially, for a sample melt-processed in 0.1% O2 in Ar, the magnetization hysteresis (M-H) loop was kept open up to 7 T at 77 K and for the field parallel to the c-axis of the sample (H//c), implying that very effective flux pinning can be achieved in high magnetic fields.

Original languageEnglish
Pages (from-to)L1000-L1003
JournalJapanese Journal of Applied Physics
Volume33
Issue number7
DOIs
Publication statusPublished - 1994 Jul
Externally publishedYes

Keywords

  • Anomalous peak effect
  • Flux pinning
  • Melt process
  • NdBaCuO
  • NdBaCuO solid solutions
  • Oxygen partial pressure

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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