熔融织构YBa_2Cu_3O_(7-y)各向异性临界电流密度的磁测量  

MAGNETIZATION MEASUREMENT OF ANISOTROPIC CRITICAL CURRENT DENSITIES IN MELT TEXTURED YBa_2Cu_3O_(7_y)

作　　者：范宏昌 金新[1] 鹿牧[1] 张贻瞳 徐小农[1] 姚希贤[1] 

机构地区：[1]南京大学物理系

出　　处：《物理学报》1992年第2期317-322,共6页Acta Physica Sinica

基　　金：国家超导技术联合研究开发中心资助的课题

摘　　要：用测磁滞迴线的方法测量熔融织构YBa_2Cu_3O_(7-y)超导样品的临界电流密度,计算临界电流密度时考虑了退磁场的影响并采用适合于各向异性有限样品的模型,改进了Gyorgy等人最近提出的方法,在不同取向的磁场中测同一样品的磁化曲线,得到三种不同的临界电流密度。Anisotropic critical current densities of melt textured YBazCu3O7-y superconductor were measured using d.c. magnetization measurements. Effcet of demagnetizing field was taken into account. A model appropriate to finite anisorropic samples was adopted and the method proposed recently by Gyorgy et al. was modified. We measured magnetization curves of a rectangular parallelepiped sample in magnetic fields parallel to different edges of the sample and obtained values of three different critical current densities.

关 键 词：超导体 高TC MTG法 JC YBACUO 

分 类 号：TM262[一般工业技术—材料科学与工程]