不同Nb，Mo含量的Fe基微晶软磁合金磁性能的频谱特性

FREQUENCY ANALYSIS ON MAGNETIC PROPERTIES OF THE ULTRAFINE CRYSTALLINE Fe BASED SOFT MAGNETIC ALLOYS

利用无磁场、纵向磁场和横向磁场３种热处理方式，制力求４种不同Ｎｂ、Ｍｏ含量的Ｆｅ７４．５Ｃｕ１Ｍ３Ｓｉ１２．５Ｂ９．５（Ｍ为Ｎｂ、Ｍｏ原子质量百分数之和）纳米晶试样，分别测量试样的复值磁导率｜μ｜Ｏ．３，矫顽力｜Ｈｃ｜和铁芯损耗Ｐｃｏ．２，分析试样的频谱特性和成分的影响．结果表明，不含Ｍｏ的Ｆｅ７４．５Ｃｕ１Ｎｂ３Ｓｉ１２．５Ｂ９．５合金的｜μ｜０．３随频率增加而下降的趋势最小，需含Ｍｏ的Ｆｅ７４．５Ｃｕ１Ｎｂ２Ｍｏ１Ｓｉ１２．５Ｂ９．５合金的｜μ｜Ｏ．３值最大，且｜Ｈ｜和Ｐｃｏ．２的值最小．在３种磁场热处理中，无磁场热处理后的试样的｜μ｜０．３最大，且｜Ｈｃ｜和Ｐｃｏ．２的值最小；而纵向磁场热处理后的试样的｜μ｜０３最小。

Using non magnetic field,longitudinal magnetic field and transverse magnetic field annealing,four series of Fe 74 5 Cu 1 M 3Si 12 5 B 9 5 ( M the sum of atomic percentage of Nb and Mo) ultrafine crystalline samples with various Nb and Mo contents were made.The relative complex permeability| | 0 3 ,the coercive force| c| and the core loss P c 0 2 of samples were measured,and their frequency analysis and effect of composition were analyzed respectively.The experimental results showed that the relative complex permeability | | 0 3 of Fe 74 5 Cu 1Nb 3Si 12 5 B 9 5 alloy has minimum change with increasing in frequency.On the other hand,the Fe 74 5 Cu 1Nb 2Mo 1Si 12 5 B 9 5 alloy has maximum | | 0 3 ,minimum | c| and P c 0 2 .The samples after non magnetic field annealing have maximum| | 0 3 ,minimum | c| and P c 0 2 .The samples after longitudinal magnetic field annealing have minimum| | 0 3 ,maximum | c| and P c 0 2 .The magnetic properties of the samples undergoing transverse magnetic field annealing are in the middle.