高温超导永磁体内部电磁振荡的产生及其对脉冲磁化效果的影响  

MAGNETO THERMAL OSCILLATIONS IN HTS PERMANENT MAGNETS

作　　者：丘明[1] 韩朔[1] 林良真[1] 

机构地区：[1]中国科学院电工研究所

出　　处：《低温物理学报》1998年第1期70-76,共7页Low Temperature Physical Letters

基　　金：国家自然科学基金;国家超导技术联合中心资助

摘　　要：在脉冲磁化过程中由于磁热不稳定性的发生，造成高温超导永磁体温度和钉扎场的周期性振荡，并延续到外场去除后的钉扎场弛豫过程中，就此本文从Ｍａｘｗｅｌ方程出发，分析和讨论了电磁振荡产生的原因及其对永磁体磁稳定性和脉冲磁化效果的影响．AbstractMeasurements of magnetization in melt textured YBCO bulks were reported in many papers. Exposing the samples to a time dependent external magnetic field, distinguishable flux jumps were observed which are preceded by oscillations of the magnetization and the temperature of the samples. Based on electromagnetic and thermal equations, these instabilites were interpreted and the influence on pulsed magnetization and the trapped flux stability has been discussed.

关 键 词：电磁振荡 脉冲磁化 高TC 超导体 永磁体 

分 类 号：TM265.014[一般工业技术—材料科学与工程]