缓慢退磁的超导圆盘中的俘获场  

TRAPPED FIELD IN A SUPERCONDUCTING DISK MAGNETIZED WITH LOW SWEPT-DOWN RATE OF APPLIED FIELD

作　　者：孟立飞[1] 候阳[1] 高政祥[1] 

机构地区：[1]北京大学物理学院,北京100871

出　　处：《低温物理学报》2005年第2期123-129,共7页Low Temperature Physical Letters

基　　金：国家自然科学基金 (项目编号 :10 174 0 0 4 ) ;国家重点基础研究项目 (项目编号 :NKBRSF G19990 6 4 6 0 2 )的资助;北京大学泰兆奖学金的资助 .

摘　　要：本文提出了一个系统的理论框架计算通过场冷过程磁化的超导圆盘中的俘获场和温度分布.此计算基于电流运动方程,考虑到电流密度是温度和磁场的函数,考虑到在正常区和超导区由磁通运动产生的热耗散.计算结果和最近不同研究组的实验结果一致.A systematic theoretic framework is proposed to calculate the trapped magnetic field and temperature distributions in a superconducting disk magnetized by a field-cooling process. The calculations are based on the equation of current motion with temperature and field-dependent critical current density, and the heat dissipation produced by flux motion in the normal state region and the superconducting state region. The calculated results are in good agreement with the recently experimental results reported by different groups.

关 键 词：俘获场 超导 圆盘 退磁 运动方程 温度分布 框架计算 电流密度 计算结果 磁通运动 研究组 热耗散 函数 磁场 

分 类 号：O511[理学—低温物理]