Investigation of Flux Pinning and Critical Current Densities in Type II Superconductors.

摘要

Magnetization measurements, M(H,T) were made on a series of Nb and NbTi multifilament conductors as well as a series of heat treated monofilament Nb-25% Zr conductors. From these measurements the pinning force (F sub p) (H,T) and the critical current characteristics, (J sub c)(H) are deduced for all samples. The scaling law theory of flux pinning was found to be valid,in general,for all these materials. Metallurgical examinations have been made on the Nb-Zr samples to relate heat treatment, J sub c and microstructure. (Author)