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

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 1

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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Ban, E., Ikebe, Y., Matsuoka, Y., & Watanabe, K. (2005). The effect of oxygen partial pressure on melt growth processing for filamentary Dy-Ba-Cu-O superconductors. IEEE Transactions on Applied Superconductivity, 15(2 PART III), 2779-2782. https://doi.org/10.1109/TASC.2005.848211

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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.",

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

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AU - Ban, Eriko

AU - Ikebe, Yumiko

AU - Matsuoka, Yoshiharu

AU - Watanabe, Kazuo

PY - 2005/6/1

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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.

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