Numerical simulation of a magnetostatically coupled composite magnet
Numerical simulation of a magnetostatically coupled composite magnet
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DOI：
10.1063/1.2710739
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发表时间：
2007-04
影响因子：
3.2
通讯作者：
A. Gabay;G. Hadjipanayis
中科院分区：
文献类型：
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作者：
A. Gabay;G. Hadjipanayis
为了更好地理解由Nd-Fe-B薄带和粗铁粉混合而成的模压镦粗复合磁体的磁化反转，用一个简单的模型模拟了软硬复合磁体的退磁行为。计算结果表明，只要夹杂物形成垂直于磁化方向的层状结构，任何尺寸的软磁夹杂物都可以通过长程静磁相互作用与硬基体完全磁耦合。虽然静磁耦合沿着方向并没有导致复合磁体硬磁性能的提高，但它使得硬相和软相之间的完全交换耦合变得不必要，因此放松了对软夹杂物尺寸的严格要求。将静磁耦合和部分交换耦合结合在具有层状结构的模具镦锻磁体中，有利于开发性能上级单相磁体的各向异性软硬复合磁体。
The demagnetization behavior of the hard-soft composite magnet has been simulated with a simple model in order to understand better the magnetization reversal of die-upset composite magnets fabricated from blends of Nd–Fe–B ribbons and coarse Fe powders. The calculations show that soft magnetic inclusions of any size can be fully magnetically coupled with the hard matrix by long-range magnetostatic interactions provided that the inclusions form layers perpendicular to the magnetization direction. Though the magnetostatic coupling along does not lead to enhanced hard magnetic properties of the composite magnets, it makes the full exchange coupling between the hard and soft phases unnecessary and, therefore, relaxes the strict requirements for the size of the soft inclusions. The combination of magnetostatic coupling and partial exchange coupling in a die-upset magnet with layered morphology may facilitate the development of anisotropic hard-soft composite magnets with properties superior to the single-phas...