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 language | English |
|---|---|
| Pages (from-to) | 439-448 |
| Number of pages | 10 |
| Journal | Journal of Alloys and Compounds |
| Volume | 250 |
| Issue number | 1-2 |
| Publication status | Published - 1997 Mar 20 |
| Externally published | Yes |
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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 journal › Article
}
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
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 -