Oxygen Controlled Melt Growth of Filamentary Nd123 Oxide Superconductor by Solution Spinning Method

Abstract

The oxygen controlled melt growth process for the filamentary Nd123 superconductor produced by solution spinning to obtain a high J c was examined. The filaments have been prepared by dry spinning through a homogeneous aqueous solution containing mixed acetates of Nd, Ba and Cu, poly(vinyl alcohol) and organic acids. By controlling the starting compositions and the melt growth process, a high T c of 94.5 K and a high J c of more than 1.3x10 4 A/cm 2 at 77 K and 0 T were achieved for the filamentary Nd 1.18 Ba 2.12 Cu 3.09 O x superconductor with a diameter of 60 µm. The grains in the sample are not always aligned along the fiber length.