采用化学法和自组装技术制备各向异性硬磁/软磁纳米颗粒交换耦合多层自组装阵列，在纳米尺度对交换耦合进行精确调控。系统研究硬磁纳米颗粒的尺寸、磁晶各向异性、形状各向异性、畴结构、软磁纳米颗粒的尺寸、种类和形貌、硬磁和软磁相界面结构及易磁化轴取向对近程直接交换耦合的影响；在此基础上，在硬磁纳米颗粒表面包覆隔离层，进一步研究隔离层的材料、磁性、厚度、不同硬磁软磁结构等因素对长程间接交换耦合的影响，从而找出这些因素与长程间接交换耦合的内在关系。研究不同温度和磁场下不同结构多层自组装阵列横断面和平面的静态和动态磁畴结构及磁距分布，找出对交换耦合机制和磁性能影响的内在机理。利用微磁学模拟完善各向异性硬磁/软磁纳米颗粒多层自组装阵列这一新颖模型的近程直接、长程间接交换耦合的理论模型。结合实验结果和理论模型，探讨获得高最大磁能积纳米复合永磁材料的最佳微观结构，对进一步发展纳米复合永磁材料提供有效指导。

In order to accurately control exchange coupling in nanoscale, anisotropic hard magnetic/soft magnetic nanoparticles (NPs) multilayer self-assembly arrays will be prepared through chemical synthesis and self-assembly methods. Influences of size, magnetocrystalline anisotropy, shape anisotropy and domain structure of hard magnetic NPs, size, materials and morphology of soft magnetic NPs, interface structure and orientation of easy axis on short range direct exchange coupling will be investigated. Spacer layer will be coated on the surface of hard magnetic NPs. Influences of materials, magnetism and thickness of spacer layer and different hard and soft magnetic structure on long range indirect exchange coupling will be further studied to find the intrinsic relationship between these factors and exchange coupling. Distribution of the magnetic moment of the interface and interlayer in cross section and domain structure in the surface of the samples with different structure will be investigated by changing temperature and external magnetic field, to further find out the regularity and the effects of these conditions on magnetic properties and exchange coupling. The micromagnetic simulation will be used to develop the theoretical models of short range direct and long range indirect exchange coupling of anisotropic hard magnetic/soft magnetic NPs multilayer self-assembly arrays. Combined the experimental results and the theoretical models, the optimal microstructure of nanocomposite permanent magnets with high energy product will be discussed, which will offer a role of guidance for the development of nanocomposite permanent magnets.