Melt-processed LRE-Ba-Cu-O superconductors and prospects for their applications

S. I. Yoo, H. Fujimoto, Naomichi Sakai, Masato Murakami

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We have recently found that control of the oxygen partial pressure (PO2) during melt processing, named the oxygen-controlled melt-growth (OCMG) process, is critical for obtaining a high superconducting transition temperature (Tc) in the light rare earth (LRE)-Ba-Cu-O (LREBCO) superconductors particularly for Nd, Sm and Eu. Further, compared to a good melt-processed Y-Ba-Cu-O (YBCO) bulk superconductor, LREBCO bulks exhibit larger critical current density (Jc) in high magnetic field and a much improved irreversibility field (Hirr) at 77 K, implying that more effective flux pinning can be realized in a commercially feasible way. In this paper, properties and characteristic flux pinning of OCMG-processed LREBCO (LRE: Nd,Sm,Eu) superconductors are described on the basis of our study during the last several years. We also present the prospects for bulk-type applications, such as the magnetic bearings, flywheels and magnetically levitated (MAGLEV) trains.

Original languageEnglish
Pages (from-to)439-448
Number of pages10
JournalJournal of Alloys and Compounds
Volume250
Issue number1-2
Publication statusPublished - 1997 Mar 20
Externally publishedYes

Fingerprint

Rare earths
Superconducting materials
Flux pinning
Oxygen
Critical current density (superconductivity)
Magnetic bearings
Flywheels
Partial pressure
Superconducting transition temperature
Magnetic fields
Processing

Keywords

  • Melt processing
  • Superconductors

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Melt-processed LRE-Ba-Cu-O superconductors and prospects for their applications. / Yoo, S. I.; Fujimoto, H.; Sakai, Naomichi; Murakami, Masato.

In: Journal of Alloys and Compounds, Vol. 250, No. 1-2, 20.03.1997, p. 439-448.

Research output: Contribution to journalArticle

@article{7be037a3c0204dbd81a4314f57337caf,
title = "Melt-processed LRE-Ba-Cu-O superconductors and prospects for their applications",
abstract = "We have recently found that control of the oxygen partial pressure (PO2) during melt processing, named the oxygen-controlled melt-growth (OCMG) process, is critical for obtaining a high superconducting transition temperature (Tc) in the light rare earth (LRE)-Ba-Cu-O (LREBCO) superconductors particularly for Nd, Sm and Eu. Further, compared to a good melt-processed Y-Ba-Cu-O (YBCO) bulk superconductor, LREBCO bulks exhibit larger critical current density (Jc) in high magnetic field and a much improved irreversibility field (Hirr) at 77 K, implying that more effective flux pinning can be realized in a commercially feasible way. In this paper, properties and characteristic flux pinning of OCMG-processed LREBCO (LRE: Nd,Sm,Eu) superconductors are described on the basis of our study during the last several years. We also present the prospects for bulk-type applications, such as the magnetic bearings, flywheels and magnetically levitated (MAGLEV) trains.",
keywords = "Melt processing, Superconductors",
author = "Yoo, {S. I.} and H. Fujimoto and Naomichi Sakai and Masato Murakami",
year = "1997",
month = "3",
day = "20",
language = "English",
volume = "250",
pages = "439--448",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "1-2",

}

TY - JOUR

T1 - Melt-processed LRE-Ba-Cu-O superconductors and prospects for their applications

AU - Yoo, S. I.

AU - Fujimoto, H.

AU - Sakai, Naomichi

AU - Murakami, Masato

PY - 1997/3/20

Y1 - 1997/3/20

N2 - We have recently found that control of the oxygen partial pressure (PO2) during melt processing, named the oxygen-controlled melt-growth (OCMG) process, is critical for obtaining a high superconducting transition temperature (Tc) in the light rare earth (LRE)-Ba-Cu-O (LREBCO) superconductors particularly for Nd, Sm and Eu. Further, compared to a good melt-processed Y-Ba-Cu-O (YBCO) bulk superconductor, LREBCO bulks exhibit larger critical current density (Jc) in high magnetic field and a much improved irreversibility field (Hirr) at 77 K, implying that more effective flux pinning can be realized in a commercially feasible way. In this paper, properties and characteristic flux pinning of OCMG-processed LREBCO (LRE: Nd,Sm,Eu) superconductors are described on the basis of our study during the last several years. We also present the prospects for bulk-type applications, such as the magnetic bearings, flywheels and magnetically levitated (MAGLEV) trains.

AB - We have recently found that control of the oxygen partial pressure (PO2) during melt processing, named the oxygen-controlled melt-growth (OCMG) process, is critical for obtaining a high superconducting transition temperature (Tc) in the light rare earth (LRE)-Ba-Cu-O (LREBCO) superconductors particularly for Nd, Sm and Eu. Further, compared to a good melt-processed Y-Ba-Cu-O (YBCO) bulk superconductor, LREBCO bulks exhibit larger critical current density (Jc) in high magnetic field and a much improved irreversibility field (Hirr) at 77 K, implying that more effective flux pinning can be realized in a commercially feasible way. In this paper, properties and characteristic flux pinning of OCMG-processed LREBCO (LRE: Nd,Sm,Eu) superconductors are described on the basis of our study during the last several years. We also present the prospects for bulk-type applications, such as the magnetic bearings, flywheels and magnetically levitated (MAGLEV) trains.

KW - Melt processing

KW - Superconductors

UR - http://www.scopus.com/inward/record.url?scp=0346880204&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346880204&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0346880204

VL - 250

SP - 439

EP - 448

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - 1-2

ER -