Tl_2Ba_2Ca_2Cu_3O_y超导体磁通钉扎能的分布  

TIME DEPENDENT CRITICAL CURRENT AT ZERO FIELD FOR SINTERED Tl2Ba2Ca_2Cu_5O_y SUPERCONDUCTOR

作　　者：丁世英[1] 史可信[1] 曾朝阳[1] 余正[1] 施智祥[1] 邱里[1] 

机构地区：[1]南京大学物理系固体微结构实验室,南京210008

出　　处：《物理学报》1991年第6期985-989,共5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：描述一种测量高温超导体磁通钉扎能U_0及其分布的新方法,此方法主要之点是测量磁化后样品的零场临界电流随时间的变化,利用这一方法测量Tl_2Ba_2Ca_2Cu_3O_y的U_0值分布(T=78K)。根据所得结果,对已报道的U_0值的分散性提出一种新解释。A new method determining the distribution of flux pinning energy U0, is described. The method is mainly the measurement of time dependent zero field critical current for sintered high temperature superconductor magnetized in applied field. By means of this method, the Uo distribution of Tl2Ba2Ca2Cu3O_y at 78K is obtained. Based on the experimental result, the dispersion of reported U0 is discussed.

关 键 词：TLBACACUO 磁通钉扎能 超导体 

分 类 号：TM262[一般工业技术—材料科学与工程]