利用原子力显微镜（AFM）和磁力显微镜（MFM）技术初步观测了由单畴或接近单畴的钡钴钛铁氧体BaMxFe12-xO19（M=Co，Ti；x=0．7）颗粒做成的磁性涂层的形貌和表面散磁场的分布状况。同时用振动样品磁强计（VSM）测量了该涂层的退磁曲线。从观测照片上可以看出涂层表面颗粒分布状态和磁场分布情况，可望进一步研究获得磁化后涂层表面的剩余磁通分布和大小给出定量的描述该文简明介绍了原子力显微镜（AFM）和磁力显微镜（MFM）的基础原理 The microstructure of BaMxFe12-xO19 (M = Co, Ti; x = 0.7) particles made of single-domain or near-single domain by atomic force microscopy (AFM) and magnetic force microscopy (MFM) Magnetic coating morphology and surface scattered magnetic field distribution. The demagnetization curve of the coating was measured simultaneously with a vibrating sample magnetometer (VSM). From the observation photos, we can see the particle distribution and the magnetic field distribution on the surface of the coating. It is expected to further study the distribution and size of the residual flux on the surface of the coating after magnetization is given. This paper briefly introduces the atomic force microscope (AFM) And the basic principle of magnetic force microscope (MFM)