Abstract
We have succeeded in fabricating Nd-Ba-Cu-O bulk superconductors, which exhibit high Tc and a sharp superconducting transition, by the melt process in air without additional high temperature annealing in a reduced oxygen atmosphere. The key to this achievement is the use of Ba-rich Nd4-2zBa2+2zCu2-zO10-δ as a precursor. Fabricated bulk samples exhibit onset Tc values of 94-95 K and the secondary peak effect in the M-H loop like the case of Nd-Ba-Cu-O superconductors produced by melt processing in a reduced oxygen atmosphere. The peak position and the irreversibility field for the best sample were about 1.2 T and 5 T at 77.3 K, respectively, and the estimated Jc at the peak field was about 2.3 × 104 A cm-2.
| Original language | English |
|---|---|
| Pages (from-to) | 85-88 |
| Number of pages | 4 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 289 |
| Issue number | 1-2 |
| Publication status | Published - 1997 Aug 15 |
| Externally published | Yes |
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Keywords
- Critical current density
- Melt process
- Nd-ba-cu-o
- Phase diagram
- Solid solution
- Superconductor
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Melt processing of high-Tc Nd-Ba-Cu-O superconductors in air. / Kojo, H.; Yoo, S. I.; Murakami, Masato.
In: Physica C: Superconductivity and its Applications, Vol. 289, No. 1-2, 15.08.1997, p. 85-88.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Melt processing of high-Tc Nd-Ba-Cu-O superconductors in air
AU - Kojo, H.
AU - Yoo, S. I.
AU - Murakami, Masato
PY - 1997/8/15
Y1 - 1997/8/15
N2 - We have succeeded in fabricating Nd-Ba-Cu-O bulk superconductors, which exhibit high Tc and a sharp superconducting transition, by the melt process in air without additional high temperature annealing in a reduced oxygen atmosphere. The key to this achievement is the use of Ba-rich Nd4-2zBa2+2zCu2-zO10-δ as a precursor. Fabricated bulk samples exhibit onset Tc values of 94-95 K and the secondary peak effect in the M-H loop like the case of Nd-Ba-Cu-O superconductors produced by melt processing in a reduced oxygen atmosphere. The peak position and the irreversibility field for the best sample were about 1.2 T and 5 T at 77.3 K, respectively, and the estimated Jc at the peak field was about 2.3 × 104 A cm-2.
AB - We have succeeded in fabricating Nd-Ba-Cu-O bulk superconductors, which exhibit high Tc and a sharp superconducting transition, by the melt process in air without additional high temperature annealing in a reduced oxygen atmosphere. The key to this achievement is the use of Ba-rich Nd4-2zBa2+2zCu2-zO10-δ as a precursor. Fabricated bulk samples exhibit onset Tc values of 94-95 K and the secondary peak effect in the M-H loop like the case of Nd-Ba-Cu-O superconductors produced by melt processing in a reduced oxygen atmosphere. The peak position and the irreversibility field for the best sample were about 1.2 T and 5 T at 77.3 K, respectively, and the estimated Jc at the peak field was about 2.3 × 104 A cm-2.
KW - Critical current density
KW - Melt process
KW - Nd-ba-cu-o
KW - Phase diagram
KW - Solid solution
KW - Superconductor
UR - http://www.scopus.com/inward/record.url?scp=0031220453&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031220453&partnerID=8YFLogxK
M3 - Article
VL - 289
SP - 85
EP - 88
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -