摘要
以Nd_2Fe_(14)B/α-Fe为例,研究了晶粒之间交换耦合相互作用对纳米复合永磁体有效各向异性的影响。纳米复合永磁体的有效各向异性常数可用软-软、硬-硬、软-硬三种不同晶粒界面对应有效各向异性常数的统计平均值表示。计算结果表明:材料的有效各向异性常数K_(eff)随软磁性相成分的增加而降低;在相成分比例一定的条件下,随软、硬磁性相晶粒尺寸比值的增加而增加。
Effects of exchange - coupling interaction between grains on the effective anisotropy in nano -composite permanent magnets were investigated, taking Nd2Fe14B/α - Fe as sample. The effective anisotropy of nanocomposite magnets can be calculated by the statistical mean values of the effective anisotropy between the magnetically hard - hard, hard - soft and soft - soft grains. The calculated results show that the effective anisotropy constant Keff decrease with increasing magnetically soft phase component and enhance with increasing grains size ratio of soft phase to hard phase while the phase component fractions are fixed.
出处
《功能材料与器件学报》
CAS
CSCD
2003年第4期405-408,共4页
Journal of Functional Materials and Devices
基金
国家863项目(2002AA324050
2002AA302602)
山东省自然科学基金(Y2000F10)
