Development of high critical current density in multifilamentary round-wire Bi2Sr2CaCu2O8+x 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 Bi2Sr2CaCu2O8+x by strong overdoping

Superconductivity 2015-05-14 v1

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

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Abstract

Bi2Sr2CaCu2O8+x 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 1.4x10^5 A/cm^2 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 and 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.

Keywords

Bi2Sr2CaCu2O8+x critical current density overdoping round-wire conductor intergranular connectivity low temperature oxygenation

Cite

@article{arxiv.0910.1104,
  title  = {Development of high critical current density in multifilamentary round-wire Bi2Sr2CaCu2O8+x by strong overdoping},
  author = {T. Shen and J. Jiang and A. Yamamoto and U. P. Trociewitz and J. Schwartz and E. E. Hellstrom and D. C. Larbalestier},
  journal= {arXiv preprint arXiv:0910.1104},
  year   = {2015}
}

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Development of high critical current density in multifilamentary round-wire Bi2Sr2CaCu2O8+x by strong overdoping

Abstract

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