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3 纳米尺度NdFeB/α-Fe核-壳有序结构的TEM和HRTEM像及其导致的高矫顽力(H_c)和高剩磁(B_r)的结合^[13]

Fig.3 TEM and high-resolution TEM (HRTEM) images of a nano-scale core-shell ordered structure which enables a good combination of high coercivity (H_c) and large remanence (B_r) in NdFeB/α-Fe nanocomposite magnets^[13]
(a) TEM (left) and HRTEM (right) images of the core-shell structure (d—interplanar spacing, FFT—fast Fourier transform)
(b) coercivity and remanence of the core-shell NdFeB/α-Fe nanocomposite magnets (marked with the red color) and the representative isotropic NdFeB/α-Fe^{nanocomposites}