纳米双磁薄膜的自组装与交换耦合机理研究

We adopt the "bottom-up" self-assembly technique to prepare a series of FePt/Fe3O4 dual membranes, use the FePt and Fe3O4 nanocubes with same shape and size to construct the hard and soft magnetic exchange coupling double magnetic nanoparticle arrays. It provides a new way to develop the preparation of nanometer coupling magnet. The mechanism of self-assembly will be researched by finding the main factor which affect the self-assembly behavior of magnetic nanoparticle, and the exchange coupling effect between the soft and hard magnetic phase will be researched by observing the changes of magnetic property.

基于“自下而上”构筑硬软磁纳米双相复合薄膜的目标，本项目利用化学方法合成出尺寸形状一致的FePt立方颗粒和Fe3O4立方颗粒，采用自组装技术制备一系列FePt/Fe3O4双元磁性薄膜，为新型纳米双相耦合磁体开发和制备提供更新的途径。并通过探究影响磁性纳米颗粒的自组装行为的主要因素，研究磁性纳米颗粒的自组装机理；通过观察材料磁性能的变化，探讨磁性材料中软硬磁交换耦合机理。