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Field dependence of Jc for filamentary RE-Ba-Cu-O superconductors prepared by a solution spinning method

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2 Author(s)
T. Goto ; Dept. of Mater. Sci. & Eng., Nagoya Inst. of Technol., Japan ; K. Watanabe

The filamentary RE-Ba-Cu-O (RE=Nd, Nd-Eu-Gd, and Nd-Sm-Eu-Gd) precursor was prepared by a solution spinning method, through a homogeneous aqueous solution containing mixed acetates of RE, Ba and Cu, poly(vinyl alcohol) and organic acids. The filamentary precursor was partially melted in flowing 0.1%O2+Ar or 1%O2+Ar and then oxygenated under various conditions. The transport critical current density (Jc) of the samples was measured in magnetic fields up to 10 T at 77 K. The influence of field dependence of Jc on the initial different RE elements in the filamentary RE-Ba-Cu-O superconductors was examined. The field dependence of Jc was improved by mixing three or four different RE elements. The J c value at 77 K and up to 6 T for the sample partially melted in flowing 0.1%O2+Ar was higher than that for the sample melted in flowing 1%O2+Ar. The highest Jc value of more than 1.76×104 A/cm2 at 77 K and 9 T was detected for filamentary Nd-Sm-Eu-Gd-Ba-Cu-O superconductors partially melted in flowing 0.1%O2+Ar

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:11 ,  Issue: 1 )