Superconducting properties of Dy-Ba-Cu-O bulk superconductors

S. Nariki, Masato Murakami

Research output: Contribution to journalArticle

41 Citations (Scopus)

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 languageEnglish
Pages (from-to)786-790
Number of pages5
JournalSuperconductor Science and Technology
Volume15
Issue number5
DOIs
Publication statusPublished - 2002 May
Externally publishedYes

Fingerprint

Superconducting materials
Oxygen
Annealing
Oxygen vacancies
oxygen
Substitution reactions
annealing
hypoxia
inoculation
Temperature
Crystals
seeds
Air
substitutes
temperature
air
curves
crystals

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 journalArticle

@article{984424e65f5d4a22a59a53bbf0eb1eae,
title = "Superconducting properties of Dy-Ba-Cu-O bulk superconductors",
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.",
author = "S. Nariki and Masato Murakami",
year = "2002",
month = "5",
doi = "10.1088/0953-2048/15/5/329",
language = "English",
volume = "15",
pages = "786--790",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "5",

}

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 -