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本文根据非晶合金局域磁各向异性随机分布的处理方法,提出了纳米微晶软磁合金的随机局域各向异性模型,对纳米微晶合金的结构与磁性的关系进行了探讨。结果表明,纳米微晶合金的软磁特性不但与随机分布的纳米晶粒的尺寸有关,而且与晶界非晶相的铁磁性有关。相邻晶粒通过晶界非晶相发生铁磁耦合,所以晶界非晶相的铁磁性严重地影响合金的宏观磁性。Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9纳米微晶软磁合金的X射线衍射及磁性测量结果为上述理论提供了有利的支持。
In this paper, a random local anisotropy model of nanocrystalline soft magnetic alloy is proposed based on the random magnetic anisotropy distribution of amorphous alloy. The relationship between structure and magnetic properties of nanocrystalline alloy is discussed. The results show that the soft magnetic properties of nanocrystalline alloy are not only related to the size of randomly distributed nanocrystalline grains, but also to the ferromagnetism of the amorphous phase. The adjacent grains are ferromagnetically coupled through the grain boundary amorphous phase, so the ferromagnetism of the grain boundary amorphous phase seriously affects the macro-magnetic properties of the alloy. X-ray diffraction and magnetic measurement results of Fe_ (73.5) Cu_1Nb_3Si_ (13.5) B_9 nanocrystalline soft magnetic alloys provide favorable support for the above theory.