GIANT ENERGY PRODUCT IN NANOSTRUCTURED 2-PHASE MAGNETS
GIANT ENERGY PRODUCT IN NANOSTRUCTURED 2-PHASE MAGNETS
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DOI：
10.1103/physrevb.48.15812
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发表时间：
1993-12-01
影响因子：
3.7
通讯作者：
COEY, JMD
中科院分区：
文献类型：
--
作者：
SKOMSKI, R;COEY, JMD
交换硬化的纳米结构的两相系统组成的一个对齐的硬相和一个软相具有高的磁化强度的研究使用的方法，从微磁矢量方程产生解析的成核场，并占软区域之间的相互作用。在合适的结构中，成核场与体积平均各向异性常数成比例。例如，由交替的2.4nm硬磁SM 2Fe 17 N3层和9 nm Fe 65 Co 35层组成的多层可以具有高达1 MJ/m3（120 MG Oe）的能量积，其中稀土含量仅为5wt%。巨能量产物也可以在合适的细胞和无序结构中实现。
Exchange hardening of nanostructured two-phase systems composed of an aligned hard phase and a soft phase with high magnetization is investigated using an approach which yields analytic nucleation fields from the micromagnetic vector equation, and accounts for interactions between the soft regions. In suitable structures the nucleation field is proportional to the volume-averaged anisotropy constant. For example, a multilayer composed of alternating 2.4 nm hard-magnetic SM2Fe17N3 layers and 9 nm Fe65Co35 layers can have an energy product as high as 1 MJ/m3 (1 20 MG Oe), with a rare-earth content of only 5 wt %. Giant energy products may also be achieved in suitable cellular and disordered structures.