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首页> 外文会议>第19届国际稀土永磁及应用研讨会（19th International Workshop on Rare Earth Permanent Magnets amp; Their Applications）（REPM'06） >Computer Simulated Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposite Magnets
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Computer Simulated Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposite Magnets

机译：Nd2Fe14B /α-Fe纳米复合磁体的计算机模拟磁性能

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摘要

Micromagnetic models of assemblies of randomly oriented, exchanged coupled nanocrystals consisting of magnetically hard Nd2Fe14B and very soft alpha Fe have been simulated. The modeling of two-dimensional chessboard consisted of 50 vol. % hard and 50 vol.% soft nanocrystals with the size varying from 5, 10, 25, to 50 nm. Hysteresis curves of each model system were obtained by solving the Landau-Lifshitz-Gilbert equation by time integration of the stiff differential equations. The simulation was focused on the effect of domain size and distribution in each nano crystal of fixed size. Eventually the simulated results were compared with magnetic properties obtained from experimental results of NdFeNbB based magnetic alloys showing the identical grain sizes to the simulated model. The present study exhibited the important role of soft phase in terms of volume fraction and arrangement of the phase.
机译：模拟了随机取向，交换耦合的纳米晶体（由硬磁Nd2Fe14B和非常软的αFe组成）的组件的微磁模型。二维棋盘的建模包括50卷。 ％的硬纳米颗粒和50％体积的软纳米晶体，其尺寸在5、10、25至50nm之间变化。通过对刚性微分方程进行时间积分来求解Landau-Lifshitz-Gilbert方程，可获得每个模型系统的磁滞曲线。模拟的重点是固定尺寸的每个纳米晶体中畴尺寸和分布的影响。最终，将模拟结果与从基于NdFeNbB的磁性合金的实验结果获得的磁性能进行比较，显示出与模拟模型相同的晶粒尺寸。本研究显示出软相在体积分数和相排列方面的重要作用。

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