磁通蠕动对高温氧化物超导体临界电流密度的影响

INFLUENCE MAGNETIC FLUX CREEP ON CRITICAL CURRENT DENSITY OF SUPERCONDUCTOR OF HIGH TEMPERATURE OXIDE

研究了Y氧化物超导体的M（t）、Jc（T）和Ueff（M）关系.结果表明，Eu的部分替代引入了新的、更大钉扎势的钉扎中心，从而对临界电流密度有明显影响．

The relationships between M(t),Jc(T) and Ueff(M) of Y-sys OxideSuperconductor are studied in this paper. Results show that when the elemet Y is replaced with Eu partially,a new and greater pinning effect center takes place. This resultsin a remarkable inlluence on critical current density.