罐形磁芯法测量软磁薄膜复数磁导率的研究  

Study of Measuring Complex Permeability of Soft Magnetic Film by Jug shaped Magnetic Core Method

作　　者：谢天[1] 白建民 马斌 魏福林[1] 杨正 王安[2] 胡建民 

机构地区：[1]兰州大学物理科学与技术学院,甘肃兰州730000 [2]航天总公司704研究所,北京100076

出　　处：《兰州大学学报（自然科学版）》2000年第3期74-79,共6页Journal of Lanzhou University(Natural Sciences)

摘　　要：介绍了罐形磁芯法测量软磁薄膜材料磁导率的磁路结构原理 ;根据磁路磁通分布 ,给出了计算的等效磁路 ;推导了复数磁导率的计算表达式 ;利用罐形磁芯法在阻抗分析仪上测量了几种软磁薄膜样品的复数磁导率 ,并与冲击法的实验结果做了比较 ,获得了较为一致的结果 .The basic principle of m easuring permeability of soft magnetic thin films by Jug shaped magnetic method is reported. In this method the closed magnetic circuit is composed of a thin f ilm and a jug shaped magnetic core. By analyzing the flux distribution and leak age in the magnetic core, an equivalent magnetic circuit for calculating mag netic reluctance of the magnetic circuit is presented. The formulas for calculat ing complex permeability of thin films have been obtained from it. By this metho d the permeabilities of two kinds of Fe Ta N nanocrystallite soft magnetic thi n films were measured with HP 4291A impedance analyzer, and checked with a sens itive flux meter. It is found that the results are agreeable, and that the jug shaped magnetic core method is an easy, valid and feasible way in measuring perm eability of soft magnetic thin films.

关 键 词：罐形磁芯法 冲击法 软磁薄膜 磁导率 磁性存储器 

分 类 号：O484.43[理学—固体物理] TQ587.21[理学—物理]