Development of high critical current density in multifilamentary round-wire Bi2 Sr2 CaCu2 O8+δ by strong overdoping

T. Shen; J. Jiang; A. Yamamoto; U. P. Trociewitz; J. Schwartz; E. E. Hellstrom; D. C. Larbalestier

doi:10.1063/1.3242339

Development of high critical current density in multifilamentary round-wire Bi2 Sr2 CaCu2 O8+δ by strong overdoping

T. Shen, J. Jiang, A. Yamamoto, U. P. Trociewitz, J. Schwartz, E. E. Hellstrom, D. C. Larbalestier

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Abstract

Bi2 Sr2 CaCu2 O8+δ is the only cuprate superconductor that can be made into a round-wire conductor form with a high enough critical current density J_c for applications. Here we show that the J_c (5 T,4.2 K) of such Ag-sheathed filamentary wires can be doubled to more than 1.4× 105 A/ cm2 by low temperature oxygenation. Careful analysis shows that the improved performance is associated with a 12 K reduction in transition temperature T_c to 80 K, an increase in flux pinning, and particularly a significant enhancement in intergranular connectivity. In spite of the macroscopically untextured nature of the wire, overdoping is highly effective in producing high J_c values.

Original language	English (US)
Article number	152516
Journal	Applied Physics Letters
Volume	95
Issue number	15
DOIs	https://doi.org/10.1063/1.3242339
State	Published - 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3242339

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title = "Development of high critical current density in multifilamentary round-wire Bi2 Sr2 CaCu2 O8+δ by strong overdoping",

abstract = "Bi2 Sr2 CaCu2 O8+δ is the only cuprate superconductor that can be made into a round-wire conductor form with a high enough critical current density Jc for applications. Here we show that the Jc (5 T,4.2 K) of such Ag-sheathed filamentary wires can be doubled to more than 1.4× 105 A/ cm2 by low temperature oxygenation. Careful analysis shows that the improved performance is associated with a 12 K reduction in transition temperature Tc to 80 K, an increase in flux pinning, and particularly a significant enhancement in intergranular connectivity. In spite of the macroscopically untextured nature of the wire, overdoping is highly effective in producing high Jc values.",

author = "T. Shen and J. Jiang and A. Yamamoto and Trociewitz, {U. P.} and J. Schwartz and Hellstrom, {E. E.} and Larbalestier, {D. C.}",

note = "Funding Information: This work was supported by U. S. National Science Foundation Division of Material Research through Grant No. DMR-0654118 and the State of Florida. The authors are grateful to Van S. Griffin, Natanette C. Craig, and Bill Starch for technical assistance. ",

year = "2009",

doi = "10.1063/1.3242339",

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volume = "95",

journal = "Applied Physics Letters",

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AU - Shen, T.

AU - Jiang, J.

AU - Yamamoto, A.

AU - Trociewitz, U. P.

AU - Schwartz, J.

AU - Hellstrom, E. E.

AU - Larbalestier, D. C.

N1 - Funding Information: This work was supported by U. S. National Science Foundation Division of Material Research through Grant No. DMR-0654118 and the State of Florida. The authors are grateful to Van S. Griffin, Natanette C. Craig, and Bill Starch for technical assistance.

PY - 2009

Y1 - 2009

N2 - Bi2 Sr2 CaCu2 O8+δ is the only cuprate superconductor that can be made into a round-wire conductor form with a high enough critical current density Jc for applications. Here we show that the Jc (5 T,4.2 K) of such Ag-sheathed filamentary wires can be doubled to more than 1.4× 105 A/ cm2 by low temperature oxygenation. Careful analysis shows that the improved performance is associated with a 12 K reduction in transition temperature Tc to 80 K, an increase in flux pinning, and particularly a significant enhancement in intergranular connectivity. In spite of the macroscopically untextured nature of the wire, overdoping is highly effective in producing high Jc values.

AB - Bi2 Sr2 CaCu2 O8+δ is the only cuprate superconductor that can be made into a round-wire conductor form with a high enough critical current density Jc for applications. Here we show that the Jc (5 T,4.2 K) of such Ag-sheathed filamentary wires can be doubled to more than 1.4× 105 A/ cm2 by low temperature oxygenation. Careful analysis shows that the improved performance is associated with a 12 K reduction in transition temperature Tc to 80 K, an increase in flux pinning, and particularly a significant enhancement in intergranular connectivity. In spite of the macroscopically untextured nature of the wire, overdoping is highly effective in producing high Jc values.

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Development of high critical current density in multifilamentary round-wire Bi2 Sr2 CaCu2 O8+δ by strong overdoping

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