熔融织构的YBCO超导体的交流磁化率频率响应  

FREQUENCY RESPONSE OF AC SUSCEPTIBILITY IN MELT TEXTUREDYBCO SUPERCONDUCTORS

作　　者：刘胜利[1] 吴坚[1] 吴高建[1] 徐锡斌[1] 邵惠民[1] 金希春[2] 

机构地区：[1]南京大学物理系固体微结构国家重点实验室,南京210093 [2]南京工业大学物理系,南京210009

出　　处：《低温物理学报》2005年第A01期592-595,共4页Low Temperature Physical Letters

摘　　要：在涡漩玻璃理论的基础上,我们推导出了交流磁化率的虚部峰值温度和频率的标度方程,可表示为Tp=Cf1/(v(z-1)).实验结果表明我们的标度方程和实验符合得很好.利用标度方程可以确定样品在磁场下的涡漩玻璃转变温度Tg和指数v(z-1)的数值.We have derived a scaling formalism for frequency dependent peak temperature Tp of the imaginary part of ac susceptibility. The scaling equation can be expressed as Tp = Cf^1/（v（z-1））＋Tg. This scaling law was applied to ac response of our melt textured YBCO superconductors. It was found that our scaling equation fit the experimental data quite well. With this scaling behavior, the values of vortex glass temperature T, and exponent v（z-1） can be estimated.

关 键 词：交流磁化率 钇系高温超导体 涡旋玻璃相变 

分 类 号：O511.4[理学—低温物理]