The effect of oxygen partial pressure on melt growth processing for filamentary Dy-Ba-Cu-O superconductors

Eriko Ban; Yumiko Ikebe; Yoshiharu Matsuoka; Kazuo Watanabe

doi:10.1109/TASC.2005.848211

The effect of oxygen partial pressure on melt growth processing for filamentary Dy-Ba-Cu-O superconductors

Eriko Ban, Yumiko Ikebe, Yoshiharu Matsuoka, Kazuo Watanabe

High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Precursor filaments of Dy-Ba-Cu-O super-conductor were prepared by a solution spinning method and partially melting in an atmosphere gas with various oxygen concentrations. It was found that the transport Jc value at 77 K and 0 T of the filamentary sample was strongly dependent on the partial-melting temperature and gas atmosphere. The samples partially melted under flowing 1%O₂ + Ar gas exhibited Jc values larger than 10⁴ A/cm² over a wide temperature range of 980-1040° C and a dense microstructure. The filamentary sample with the starting composition of Dy : Ba : Cu = 1.18 : 2.12 : 3.09 treated at 1020°C under flowing 1%O₂ + Ar showed a transport Jc value greater than 4.3 × 10⁴ A/cm ² at 77 K and 0 T, and the Jc value of 2.0 × 10³ A/cm² was maintained up to the magnetic fields of 14 T. The samples partially melted in 20% O₂ + Ar gas and 100%O₂ gas showed relatively low Jc value of 6.0 × 10³ A/cm² and 1.2 × 10² A/cm² at most.

Original language	English
Pages (from-to)	2779-2782
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.848211
Publication status	Published - 2005 Jun

Keywords

Critical current density
Dy123
Filament
Magnetic field behavior

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "The effect of oxygen partial pressure on melt growth processing for filamentary Dy-Ba-Cu-O superconductors",

abstract = "Precursor filaments of Dy-Ba-Cu-O super-conductor were prepared by a solution spinning method and partially melting in an atmosphere gas with various oxygen concentrations. It was found that the transport Jc value at 77 K and 0 T of the filamentary sample was strongly dependent on the partial-melting temperature and gas atmosphere. The samples partially melted under flowing 1%O2 + Ar gas exhibited Jc values larger than 104 A/cm2 over a wide temperature range of 980-1040° C and a dense microstructure. The filamentary sample with the starting composition of Dy : Ba : Cu = 1.18 : 2.12 : 3.09 treated at 1020°C under flowing 1%O2 + Ar showed a transport Jc value greater than 4.3 × 104 A/cm 2 at 77 K and 0 T, and the Jc value of 2.0 × 103 A/cm2 was maintained up to the magnetic fields of 14 T. The samples partially melted in 20% O2 + Ar gas and 100%O2 gas showed relatively low Jc value of 6.0 × 103 A/cm2 and 1.2 × 102 A/cm2 at most.",

keywords = "Critical current density, Dy123, Filament, Magnetic field behavior",

author = "Eriko Ban and Yumiko Ikebe and Yoshiharu Matsuoka and Kazuo Watanabe",

note = "Funding Information: Manuscript received October 3, 2004. This work was supported in part by the 21th Century COE Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan. E. Ban, Y. Ikebe, and Y. Matsuoka are with the Department of Materials Science and Engineering, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan (e-mail: ban@ccmfs.meijo-u.ac.jp). K. Watanabe is with the Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan. Digital Object Identifier 10.1109/TASC.2005.848211",

year = "2005",

month = jun,

doi = "10.1109/TASC.2005.848211",

language = "English",

volume = "15",

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journal = "IEEE Transactions on Applied Superconductivity",

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AU - Ban, Eriko

AU - Ikebe, Yumiko

AU - Matsuoka, Yoshiharu

AU - Watanabe, Kazuo

N1 - Funding Information: Manuscript received October 3, 2004. This work was supported in part by the 21th Century COE Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan. E. Ban, Y. Ikebe, and Y. Matsuoka are with the Department of Materials Science and Engineering, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan (e-mail: ban@ccmfs.meijo-u.ac.jp). K. Watanabe is with the Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan. Digital Object Identifier 10.1109/TASC.2005.848211

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N2 - Precursor filaments of Dy-Ba-Cu-O super-conductor were prepared by a solution spinning method and partially melting in an atmosphere gas with various oxygen concentrations. It was found that the transport Jc value at 77 K and 0 T of the filamentary sample was strongly dependent on the partial-melting temperature and gas atmosphere. The samples partially melted under flowing 1%O2 + Ar gas exhibited Jc values larger than 104 A/cm2 over a wide temperature range of 980-1040° C and a dense microstructure. The filamentary sample with the starting composition of Dy : Ba : Cu = 1.18 : 2.12 : 3.09 treated at 1020°C under flowing 1%O2 + Ar showed a transport Jc value greater than 4.3 × 104 A/cm 2 at 77 K and 0 T, and the Jc value of 2.0 × 103 A/cm2 was maintained up to the magnetic fields of 14 T. The samples partially melted in 20% O2 + Ar gas and 100%O2 gas showed relatively low Jc value of 6.0 × 103 A/cm2 and 1.2 × 102 A/cm2 at most.

AB - Precursor filaments of Dy-Ba-Cu-O super-conductor were prepared by a solution spinning method and partially melting in an atmosphere gas with various oxygen concentrations. It was found that the transport Jc value at 77 K and 0 T of the filamentary sample was strongly dependent on the partial-melting temperature and gas atmosphere. The samples partially melted under flowing 1%O2 + Ar gas exhibited Jc values larger than 104 A/cm2 over a wide temperature range of 980-1040° C and a dense microstructure. The filamentary sample with the starting composition of Dy : Ba : Cu = 1.18 : 2.12 : 3.09 treated at 1020°C under flowing 1%O2 + Ar showed a transport Jc value greater than 4.3 × 104 A/cm 2 at 77 K and 0 T, and the Jc value of 2.0 × 103 A/cm2 was maintained up to the magnetic fields of 14 T. The samples partially melted in 20% O2 + Ar gas and 100%O2 gas showed relatively low Jc value of 6.0 × 103 A/cm2 and 1.2 × 102 A/cm2 at most.

KW - Critical current density

KW - Dy123

KW - Filament

KW - Magnetic field behavior

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SN - 1051-8223

IS - 2 PART III

ER -

The effect of oxygen partial pressure on melt growth processing for filamentary Dy-Ba-Cu-O superconductors

Abstract

Keywords

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