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软磁纳米微晶Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9合金(即Finement)由其非晶薄带退火后得到。它由粒径10~20nm的α-Fe(Si)晶粒和剩余非晶相组成。其优良的性能和结构有关,而经540℃退火得到的纳米微晶具有最佳的软磁性能,此时,剩余非晶相约占30%~40%。非晶相(包括非晶与晶粒之间的界面层)对交换耦合有重要作用。本文选取Fe_(69.5)(CuCrV)_(9.5)Si_(13)B_8,Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9和另一成分较简单的纳米微晶(Fe_3Si)_(0.95)Nb_(0.05),以M(?)ssbauer谱分析为主要手段,研究这3种微晶的非晶相的微结构,发现存在一个具有弱磁性的界面层,可能对交换耦合起重要的作用。
Soft magnetic nanocrystalline Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 alloy (Finement) is obtained by annealing the amorphous ribbon. It consists of α-Fe (Si) grains with 10 ~ 20nm grain size and the remaining amorphous phase. Its excellent properties are related to the structure. The nanocrystallites annealed at 540 ℃ have the best soft magnetic properties. At this time, the remaining amorphous phase accounts for about 30% ~ 40%. The amorphous phase (including the interface layer between amorphous and crystalline grains) plays an important role in exchange coupling. In this paper, Fe_ (69.5) (CuCrV) _ (9.5) Si_ (13) B_8, Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 and the other simple Fe_3Si_ (0.95) Nb_ (0.05) The M (?) Ssbauer spectrum analysis as the main means to study the micro-structure of the amorphous phase of these three kinds of crystallites, found that there is a weakly magnetic interface layer, may play an important role in exchange coupling.