(BiPb)-Sr-Ca-Cu-O2223相高T_c超导体磁通钉扎与蠕动  

MAGNETIC FLUX PINNING AND CREEP IN (BiPb)-Sr-Ca-Cu-O 2223 PHASE HIGH-TC SUPERCONDUCTOR

作　　者：金新[1] 张贻瞳 鹿牧[1] 张长贵[1] 颜涌 于杨 沈剑沧[1] 姚希贤[1] 

机构地区：[1]南京大学物理系,南京210008

出　　处：《物理学报》1991年第4期630-633,共4页Acta Physica Sinica

摘　　要：本文介绍了(BiPb)-Sr-Ca-Cu-O 2223相高T_c超导体烧结工艺,用振动样品磁强计测量了磁化强度地豫率随外磁场的变化,并相应求得钉扎势U_0随外磁场的依赖关系。发现在0—0.23T外磁场范围内U_0与外磁场B的关系为U_0-B^(-1/2)与Palstra对单晶用电阻展宽实验所得结果有类似的函数形式。The preparing method of (BiPb)-Sr-Ca-Cu-O 2223 phase high-T_a superconductor is introduced. The magnetic relaxation rate dependence on applied magnetic field was measured by using a vibrating sample magnetometer. From the above results, the relationship of activation energy U_0 vs. applied magnetic fuild B is discussed. We found that the functional form is U_0-B^(-a) in the magnetic field range of 0-0.23 T. The results is similar with that of Pa-lstra based on resistance broadening experiment for single crystals.

关 键 词：高TC 超导体 磁通 钉扎 蠕动 

分 类 号：TM262[一般工业技术—材料科学与工程]