NdFeB磁体磁化及温度处理后磁畴结构的变化

摘要

We studied the phase components and magnetic domain structure of sintered NdFeB permanent magnet after magnetization and high-temperature treatment using magnetic force microscopy (MFM) and X-ray diffraction (XRD) as well as high-coercivity Co-Cr magnetic probe, made an analysis of the effect of magnetization and heat treatment on the phase components and magnetic domain structures. It is found that magnetization and high-temperature treatment result in no changes in the phase components, but obvious changes occurs in the magnetic domain structure ; open-circuit magnetic flux loss may attribute to the change of magnetic domain structures.%采用磁力显微镜(Magnetic force microscopy,MFM)和X射线衍射(XRD)研究了烧结NdFeB磁体磁化及125℃高温处理后的磁畴结构,分析了磁化及温度处理对磁体物相成分及磁畴结构的影响.结果发现,磁化及高温处理后磁体的相结构没有发生变化,而磁畴结构却发生明显变化；开路磁通的变化是磁畴结构变化引起的.