无孪晶的LaBa_(2-x)Ca_xCu_3O_y系统的磁临界电流  

MAGNETIC CRITICAL CURRENT OF LaBa_(2-x)Ca_xCu_3O_y SYSTEM WITHOUT TWIN

作　　者：卫崇德 林勤[1] 冯庆荣[1] 刘尊孝[1] 兰健[1] 尹道乐[1] 甘子钊[1] 

机构地区：[1]北京大学物理系

出　　处：《低温物理学报》1990年第2期81-85,共5页Low Temperature Physical Letters

摘　　要：测量了无孪晶的LaBaCaCu_3O_y和LaBa_(1.5)Ca_(0.5)Cu_3O-y的磁临界电流J_c,其数值及随温度的变化都与YBa_2Cu_3O_y系统比较接近,而与Tl_2Ba_2ca_2Cu_3O_y明显不同。这表明孪晶并不是使这些材料的临界电流有差别的主要因素。The magnetic critical currents J, of LaBaCaCu_3O_y and LaBa_(1.5)Ca_(0.5)Cu_3O_y were measured. The variation with temperature of J_c of these compounds is similar to that of YBa_2Cu_3O_y but different from that of Tl_2 Ba_2Ca_2Cu_3O_y. These results indicate that twins do not play an important role in determining the magnetic critical current of these compounds.

关 键 词：LaBaCaCuO 系统 磁临界电流 低温 

分 类 号：O513[理学—低温物理]