有序异构功能材料

张海天, 张湘义

Heterostructured Functional Materials with Ordered Structures

ZHANG Hai-Tian, ZHANG Xiangyi

图5 微米尺度层状序构引发的多步钉扎磁化机制及其对纳米复合永磁材料磁能积增强的作用[19]

Fig.5 Effect of micro-scale layered ordered structure on magnetization process and improvement of the energy product of (FeCo + SmCo)/NdFeB nanocomposite magnets[19] (a) TEM image and EDX mapping of the layered ordered structure (b) random and ordered layered structures (the left panel) and their magnetization processes (the right panel), the layered ordered structure shows a multi-step pinning magnetization process (M—magnetization, Ms—saturation magnetization, Hin—intrinsic coercivity) (c) ultrahigh energy product resulted from the multi-step pinning mechanism in the layered ordered nanocomposite magnets ((BH)max—maximum energy product, HSM—heterostructured material)