Abstract
We report on the superconducting properties of melt-textured Dy 123 bulk superconductors containing 5 to 40 mol% Dy211. Dy-Ba-Cu-O bulk samples were fabricated with the cold-seeding method in air using a Nd123 seed crystal. The superconducting properties of the bulk samples were strongly affected by the Dy211 content and the oxygen-annealing temperature. In the Jc-B curve of the Dy123 sample with 5 mol% of Dy211, the secondary peak was clearly observed at the applied fields of 0.5-2.0 T. The peak Jc values were 32 000-37 000 A cm-2 at 77 K. The peak position shifted to lower fields with increasing oxygen-annealing temperature, presumably due to an increase in oxygen vacancies. We believe that the peak effect in Dy-Ba-Cu-O is ascribed to oxygen deficiency, since RE/Ba substitution is not present in the system. This idea was supported by the fact that the secondary peak decreased with increasing Dy211 contents and disappeared in the Dy123 sample with 40 mol% of Dy211.
| Original language | English |
|---|---|
| Pages (from-to) | 786-790 |
| Number of pages | 5 |
| Journal | Superconductor Science and Technology |
| Volume | 15 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2002 May |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Superconducting properties of Dy-Ba-Cu-O bulk superconductors. / Nariki, S.; Murakami, Masato.
In: Superconductor Science and Technology, Vol. 15, No. 5, 05.2002, p. 786-790.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Superconducting properties of Dy-Ba-Cu-O bulk superconductors
AU - Nariki, S.
AU - Murakami, Masato
PY - 2002/5
Y1 - 2002/5
N2 - We report on the superconducting properties of melt-textured Dy 123 bulk superconductors containing 5 to 40 mol% Dy211. Dy-Ba-Cu-O bulk samples were fabricated with the cold-seeding method in air using a Nd123 seed crystal. The superconducting properties of the bulk samples were strongly affected by the Dy211 content and the oxygen-annealing temperature. In the Jc-B curve of the Dy123 sample with 5 mol% of Dy211, the secondary peak was clearly observed at the applied fields of 0.5-2.0 T. The peak Jc values were 32 000-37 000 A cm-2 at 77 K. The peak position shifted to lower fields with increasing oxygen-annealing temperature, presumably due to an increase in oxygen vacancies. We believe that the peak effect in Dy-Ba-Cu-O is ascribed to oxygen deficiency, since RE/Ba substitution is not present in the system. This idea was supported by the fact that the secondary peak decreased with increasing Dy211 contents and disappeared in the Dy123 sample with 40 mol% of Dy211.
AB - We report on the superconducting properties of melt-textured Dy 123 bulk superconductors containing 5 to 40 mol% Dy211. Dy-Ba-Cu-O bulk samples were fabricated with the cold-seeding method in air using a Nd123 seed crystal. The superconducting properties of the bulk samples were strongly affected by the Dy211 content and the oxygen-annealing temperature. In the Jc-B curve of the Dy123 sample with 5 mol% of Dy211, the secondary peak was clearly observed at the applied fields of 0.5-2.0 T. The peak Jc values were 32 000-37 000 A cm-2 at 77 K. The peak position shifted to lower fields with increasing oxygen-annealing temperature, presumably due to an increase in oxygen vacancies. We believe that the peak effect in Dy-Ba-Cu-O is ascribed to oxygen deficiency, since RE/Ba substitution is not present in the system. This idea was supported by the fact that the secondary peak decreased with increasing Dy211 contents and disappeared in the Dy123 sample with 40 mol% of Dy211.
UR - http://www.scopus.com/inward/record.url?scp=0036572592&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036572592&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/15/5/329
DO - 10.1088/0953-2048/15/5/329
M3 - Article
AN - SCOPUS:0036572592
VL - 15
SP - 786
EP - 790
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 5
ER -