高温超导球的交流磁化率  

ACSUSCEPTIBILITY FOR HIGH T_c SUPERCONDUCTING SPHERE

作　　者：林建伟[1] 丁世英[1] 

机构地区：[1]河海大学数理系,南京大学微结构物理国家重点实验室

出　　处：《低温物理学报》1995年第4期270-276,共7页Low Temperature Physical Letters

摘　　要：本文按电动力学方法计算了混合态超导球的交流磁化率．指出交流磁化率在线性响应的热助磁通流情况下的解，其虚部的峰值位置与测量频率的关系Ｔｐ（ωｐ）可用来确定磁通扩散运动的钉扎能，和磁阻实验等价，但更为方便和精确．Abstract The ac susceptibility of a superconducting sphere in the mixed state has been calculated'based on superconducting electrodynamics. It is shown that, for the linear (ohmic) response ofthermally assisted flux flow regime, the temperature Tp at which the peak of the imaginarypart of the ac susceptibility at a frequency occurs, i. e. Tp(ωp), can be used to determine theflux diffusive pinning energy, and this is equivalent to that of magneto-resistant measurement, but is more convinent and accurate.

关 键 词：高温超导球 交流磁化率 电动力学 

分 类 号：O513[理学—低温物理]