Abstract
We have achieved a large critical current density (J(c)) of 70000 A/cm2 at 77 K in 2.3 T and a large irreversibility field exceeding 7 T at 77 K for the fields parallel to the c axis in (Nd, Eu, Gd)-Ba-Cu-O in which 40 mol% (Nd, Eu, Gd)2BaCuO5 (NEG211) second phase particles are finely dispersed in the (Nd, Eu, Gd)Ba2Cu3O(y) matrix and prepared by the melt process under oxygen partial pressure of 0.1%. Microstructural observations clarified that Pt addition was effective in reducing the size of NEG211 second phase particles, which led to a dramatic increase in J(c). A clear secondary peak effect was observed in the magnetization curve, suggesting that field-induced pinning is active in parallel with the pinning by NEG211 particles.
Original language | English |
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Pages (from-to) | 42-47 |
Number of pages | 6 |
Journal | Materials Science and Engineering B |
Volume | 65 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1999 Oct 29 |
Externally published | Yes |
Keywords
- (Nd, Eu, Gd)BaCuO
- (Nd, Eu, Gd)BaCuOy
- Critical current density
- Melt process
- Microstructure
- Peak effect
- Pt addition
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering