The effect of initial composition on the oxygen controlled melt growth of filamentary Nd123 superconductor

Abstract

We have studied a fabrication of filamentary Nd123 superconductor with high superconducting properties. The filamentary Nd123 precursor was prepared by the solution-spinning method, through a homogeneous aqueous solution containing mixed acetates of Nd, Ba and Cu with various compositions, poly(vinyl alcohol) and organic acids. The filamentary superconductor was produced by the oxygen controlled melt growth (OCMG) method. The effect of initial composition on the OCMG process of the sample was studied to enhance a reproducibility of high transport J c of the sample. The compositional region for preparing the sample with high J c was narrow.