The development of melt-processed (Sm, Eu, Gd)Ba2Cu 3O7-δ single-domain superconductors for high field applications

A. Hu, Naomichi Sakai, Masato Murakami, I. Hirabayashi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

(Sm, Eu, Gd)Ba2Cu3O7-δ (RE123) single-domain superconductors were grown in 1% O2 in Ar with a modified hot-seeding melt process. Spatial superconducting variation and a local RE-Ba modulation were suppressed with the control of processing conditions. Pre-annealing at 960°C for 10 h in Ar prior to melt growth was found to significantly lower the range of RE-Ba substitution and diminish the number of pores and microcracks. Excess BaCuO2-x was added to induce a Ba-enriched liquid and thereby hinder the nucleation of RE1+xBa 2-xCu3O7-δ solid solution (RE123ss). The proper ratio of BaCuO2-x to RE123 was around (0.17-0.25):1. The optimal thermal schedule was a fast cooling with a rate of 2°C h -1 for 10 h followed by a 100 h slow cooling of 0.15°C h -1. A field of 1 T was trapped in a pellet of 35 mm diameter at 77 K and 2 T, which corresponded to the maximum external flux density of 3 T including the bias applied field.

Original languageEnglish
JournalSuperconductor Science and Technology
Volume18
Issue number2
DOIs
Publication statusPublished - 2005 Feb

Fingerprint

Superconducting materials
Cooling
cooling
microcracks
Microcracks
inoculation
schedules
pellets
Solid solutions
Nucleation
Substitution reactions
solid solutions
flux density
Modulation
nucleation
Annealing
substitutes
Fluxes
porosity
modulation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

@article{d7bfc37470d943f498cdfccc186594b2,
title = "The development of melt-processed (Sm, Eu, Gd)Ba2Cu 3O7-δ single-domain superconductors for high field applications",
abstract = "(Sm, Eu, Gd)Ba2Cu3O7-δ (RE123) single-domain superconductors were grown in 1{\%} O2 in Ar with a modified hot-seeding melt process. Spatial superconducting variation and a local RE-Ba modulation were suppressed with the control of processing conditions. Pre-annealing at 960°C for 10 h in Ar prior to melt growth was found to significantly lower the range of RE-Ba substitution and diminish the number of pores and microcracks. Excess BaCuO2-x was added to induce a Ba-enriched liquid and thereby hinder the nucleation of RE1+xBa 2-xCu3O7-δ solid solution (RE123ss). The proper ratio of BaCuO2-x to RE123 was around (0.17-0.25):1. The optimal thermal schedule was a fast cooling with a rate of 2°C h -1 for 10 h followed by a 100 h slow cooling of 0.15°C h -1. A field of 1 T was trapped in a pellet of 35 mm diameter at 77 K and 2 T, which corresponded to the maximum external flux density of 3 T including the bias applied field.",
author = "A. Hu and Naomichi Sakai and Masato Murakami and I. Hirabayashi",
year = "2005",
month = "2",
doi = "10.1088/0953-2048/18/2/012",
language = "English",
volume = "18",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - The development of melt-processed (Sm, Eu, Gd)Ba2Cu 3O7-δ single-domain superconductors for high field applications

AU - Hu, A.

AU - Sakai, Naomichi

AU - Murakami, Masato

AU - Hirabayashi, I.

PY - 2005/2

Y1 - 2005/2

N2 - (Sm, Eu, Gd)Ba2Cu3O7-δ (RE123) single-domain superconductors were grown in 1% O2 in Ar with a modified hot-seeding melt process. Spatial superconducting variation and a local RE-Ba modulation were suppressed with the control of processing conditions. Pre-annealing at 960°C for 10 h in Ar prior to melt growth was found to significantly lower the range of RE-Ba substitution and diminish the number of pores and microcracks. Excess BaCuO2-x was added to induce a Ba-enriched liquid and thereby hinder the nucleation of RE1+xBa 2-xCu3O7-δ solid solution (RE123ss). The proper ratio of BaCuO2-x to RE123 was around (0.17-0.25):1. The optimal thermal schedule was a fast cooling with a rate of 2°C h -1 for 10 h followed by a 100 h slow cooling of 0.15°C h -1. A field of 1 T was trapped in a pellet of 35 mm diameter at 77 K and 2 T, which corresponded to the maximum external flux density of 3 T including the bias applied field.

AB - (Sm, Eu, Gd)Ba2Cu3O7-δ (RE123) single-domain superconductors were grown in 1% O2 in Ar with a modified hot-seeding melt process. Spatial superconducting variation and a local RE-Ba modulation were suppressed with the control of processing conditions. Pre-annealing at 960°C for 10 h in Ar prior to melt growth was found to significantly lower the range of RE-Ba substitution and diminish the number of pores and microcracks. Excess BaCuO2-x was added to induce a Ba-enriched liquid and thereby hinder the nucleation of RE1+xBa 2-xCu3O7-δ solid solution (RE123ss). The proper ratio of BaCuO2-x to RE123 was around (0.17-0.25):1. The optimal thermal schedule was a fast cooling with a rate of 2°C h -1 for 10 h followed by a 100 h slow cooling of 0.15°C h -1. A field of 1 T was trapped in a pellet of 35 mm diameter at 77 K and 2 T, which corresponded to the maximum external flux density of 3 T including the bias applied field.

UR - http://www.scopus.com/inward/record.url?scp=24144480901&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24144480901&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/18/2/012

DO - 10.1088/0953-2048/18/2/012

M3 - Article

VL - 18

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 2

ER -