高飽和磁化を有するFe基金属ガラスの軟磁気特性

概要

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The compositional dependence of the glass-fotming ability and magnetic properties of Fe-Al-P-C-B-(Si) glassy alloys was investigated. The saturation magnetization (θ_s) increase with increasing Fe content. While the maximum thickness for glass formation (t_max) decreases when the (P, C, B) is replaced by Fe, it hardly does so when the (Al, Ga) is replaced by Fe. When P is replaced by Si, t_max increases. As a result, a high σ_s of 207×10^-6 Wbm kg^-1 and a large t_max of 220μm were simultaneously obtained in a Fe_77Al_2.14Ga_0.86P_8.4C_5B_4Si_2.6 glassy alloy. The core loss of this glassy alloy with a smaple thickness of 100 μm at f=50 Hz and B_m=1.0T was 0.22 Wkg, which is lower than those of 6.5% Si-Fe alloy and amorphous Fe_78Si_9B_13 alloy with the same sample thickness. Therefore, it can be said that the Fe-Al-Ga-P-C-B-Si glassy alloys are useful for inductive applications.
社団法人日本磁気学会の論文
1998-06-01