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 |
|---|---|
| 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 |
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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)
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Enhancement of critical current density in (Nd, Eu, Gd)-Ba-Cu-O superconductors. / Miryala, Muralidhar; Segawa, K.; Murakami, Masato.
In: Materials Science and Engineering B, Vol. 65, No. 1, 29.10.1999, p. 42-47.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhancement of critical current density in (Nd, Eu, Gd)-Ba-Cu-O superconductors
AU - Miryala, Muralidhar
AU - Segawa, K.
AU - Murakami, Masato
PY - 1999/10/29
Y1 - 1999/10/29
N2 - 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.
AB - 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.
KW - (Nd, Eu, Gd)BaCuO
KW - (Nd, Eu, Gd)BaCuOy
KW - Critical current density
KW - Melt process
KW - Microstructure
KW - Peak effect
KW - Pt addition
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UR - http://www.scopus.com/inward/citedby.url?scp=0033208362&partnerID=8YFLogxK
U2 - 10.1016/S0921-5107(99)00195-6
DO - 10.1016/S0921-5107(99)00195-6
M3 - Article
VL - 65
SP - 42
EP - 47
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
SN - 0921-5107
IS - 1
ER -