高温超导体的磁化与磁滞损耗  

MAGNETIZATION AND HYSTERESIS LOSSES OF HIGH-T_c SUPERCONDUCTOR

作　　者：胡立发[1] 周廉[1] 张平祥[1] 王金星[2] 

机构地区：[1]西北有色金属研究院超导材料研究所,西安710016 [2]东北大学物理系,沈阳110006

出　　处：《物理学报》2001年第7期1359-1365,共7页Acta Physica Sinica

基　　金：国家超导技术联合研究发展中心资助! (批准号 :CD0 10 10 1)&&

摘　　要：利用三种临界态模型 (Bean模型、Kim模型和指数模型 ) ,采用比较简单的方法 ,以Bi2 2 2 3高温超导体为例 ,给出了平板状超导体的初始磁化曲线和磁滞回线的解析表达式 .对不同温度和磁场下的磁化强度进行了编程计算 ,对计算结果进行讨论 .利用推导的公式 ,讨论了温度和外加磁场对高温超导体的磁滞损耗的影响 .Three kinds of critical state models, such as Bean's model, Kim's model and Power model, are selected to analyze numerically the initial magnetic curve and hysteresis loop of Bi2223 high-T c superconductor, as an example, with a simple method. Programs are made to calculate the magnetization as a function of applied magnetic field and temperature. The results are discussed compare the three kinds of critical state models. The hysteresis losses of superconductors at different temperatures and under different amplitudes of applied magnetic field are studied according to functions derived using these models.

关 键 词：磁滞损耗 磁通钉扎 高温超导体 临界态模型 磁化 磁化强度 

分 类 号：TM26[一般工业技术—材料科学与工程]