采用立方晶粒结构模型研究了晶粒间界相对纳米硬磁材料交换耦合相互作用和有效各向异性的影响.结果表明,晶粒间界相减弱了交换耦合作用,使晶粒的平均各向异性〈K〉增加,有助于提高材料的有效各向异性Keff;而非磁性晶粒间界相又会使Keff降低,导致Keff在间界相为某一厚度d时取极大值.适当厚度的晶粒间界相可以提高材料的有效各向异性和矫顽力.
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