Compacted 1-2-3 ceramic powders treated as superconducting composites

Magnetization studies of closely spaced fine-filamentary Cu/NbTi composites have shown that, at very low applied field strengths, proximity-effect coupling (across the Cu matrix) between the filaments causes the assembly to exclude flux in the manner of a solid block of superconductor of the same outside diameter as the filamentary bundle. Then at somewhat higher applied field strengths (but still with H>