高温超导带材的临界电流各向异性的实验研究  

EXPERIMENTAL STUDY ON CRITICAL CURRENT ANISOTROPY OF HTS TAPES UNDER DC MAGNETIC FIELD

作　　者：王银顺[1] 赵祥[2] 许熙[1] 肖立业[1] 林良真[1] 鲁光辉[2] 惠东[1] 戴少涛[1] 

机构地区：[1]中国科学院电工研究所应用超导实验室 [2]新疆特变电工股份有限公司,昌吉831100

出　　处：《低温物理学报》2003年第A01期238-242,共5页Low Temperature Physical Letters

基　　金：国家重点基础研究专项基金 (973计划 ;NKBSF 19990 6460 8);河北大学博士基金资助项目~~

摘　　要：高温超导带材的临界电流在 77K不同磁场大小和方向上相差很大 ,表现出强烈的各向异性 .我们对此进行了仔细的实验研究 ,得到了磁场与超导带带面任何夹角情况下临界电流非常简单的解析经验表达式 :只要得到在平行场和垂直场下临界电流的变化特性就可以计算出任何磁场与超导带面夹角下的临界电流 ,计算结果与实验结果吻合得很好 ,对高温超导带材的应用研究具有重要的实际意义 .There is great difference of critical current in HTS tapes under the magnetic field with different magnitude and oritations at 77K, which shows strongly anisotropy of critical current. Based on detailed experiments,a simple analytical empirical relation of critical current is obtained. If critical current characteristics of parallel and perpendicular magnetic fields are known, we can calculate the critical current with any angle between tape surface and directions of magnetic fields. The calculated results are in good agreement with those of experiments, which is important for application of HTS from practical point of view.

关 键 词：高温超导 临界电流 各向异性 粉末管装法 铋2223超导体 磁通钉扎 磁通蠕动 

分 类 号：O511.9[理学—低温物理]