【摘要】 利用AFM /MFM研究了Nd含量 4%～ 10 .5 %的Nd2 Fe1 4B/α Fe型纳米双相永磁体的微观磁结构及其与交换耦合的关系。结果表明 ,样品磁畴形貌及磁衬强度均随磁体成分不同而变化。磁畴相对尺寸可以反映交换耦合的强度 ,晶粒间的交换耦合作用越强 ,磁畴相对尺寸越大 ,当Nd含量约为 10 %左右时交换耦合作用最强更多还原

【Abstract】 Relationship between magnetic microstructure and exchange coupling in nanocomposite magnets with Nd content 4%～10.5% was studied by AFM/MFM. The results show that the characteristics of magnetic domains vary with alloy compositions. The relative size of domains in nanocomposite NdFeB can reflect the intensity of exchange coupling. The exchange coupling effect increases with the increased relative size. The maximum exchange coupling effect is found when the Nd content is about 10%.更多还原