关键词: 非晶Ｆｅ_７８Ｓｉ_９Ｂ_１３合金 , 　脉冲磁场 , 　纳米晶化 , 　纳米晶化磁致伸缩系数

Abstract: The low frequency pulse magnetic field leads the amorphous thin strip Fe78Si9B13 to produce nano crystallization, precipitating α-Fe (Si) nano phase, and then forming α-Fe (Si) nanocrystalline and residual amorphous dual phase nanocrystalline alloy. Mossbauer spectral analysis, with the strength of the pulse magnetic field, crystallization phase volume fraction of dual phrase nano crystalline alloy increases. The magnetostrictive coefficient λcs CS of nano crystalline phase of α-Fe ( Si ) is negative, with range from- 1.287×10-4 to - 1.345×10-4.Controlling crystallization phase volume ratio can minimize the effective magnetostrictive coefficient λes of dual phase nanocrystalline alloy, benefiting the improvement of dual phase nanocrystalline alloy soft magnetic properties.

Key words: Amorphous Fe78Si9B13 alloy , Pulsed magnetic field , Nanocrystallization ,  Nanocrystallization magnetostriction coefficient