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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Micromagnetics of rare-earth efficient permanent magnets
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Micromagnetics of rare-earth efficient permanent magnets

机译：稀土高效永磁磁铁的微观学

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The development of permanent magnets containing less or no rare-earth elements is linked to profound knowledge of the coercivity mechanism. Prerequisites for a promising permanent magnet material are a high spontaneous magnetization and a sufficiently high magnetic anisotropy. In addition to the intrinsic magnetic properties the microstructure of the magnet plays a significant role in establishing coercivity. The influence of the microstructure on coercivity, remanence, and energy density product can be understood by using micromagnetic simulations. With advances in computer hardware and numerical methods, hysteresis curves of magnets can be computed quickly so that the simulations can readily provide guidance for the development of permanent magnets. The potential of rare-earth reduced and rare-earth free permanent magnets is investigated using micromagnetic simulations. The results show excellent hard magnetic properties can be achieved in grain boundary engineered NdFeB, rare-earth magnets with a ThMn12 structure, Co-based nano-wires, and L1(0)-FeNi provided that the magnet's microstructure is optimized.
机译：含有较少或不稀土元素的永久磁铁的发展与矫顽力机制的深刻知识有关。有前途的永磁材料的先决条件是高自发磁化和足够高的磁各向异性。除了固有磁性之外，磁体的微观结构在建立矫顽力方面发挥着重要作用。通过使用微磁性模拟可以理解微观结构对矫顽力，剩磁和能量密度产品的影响。通过计算机硬件和数值方法的进步，可以快速计算磁体的滞后曲线，使得模拟可以容易地为永磁体的开发提供指导。使用微磁性模拟研究稀土减少和稀土无磁体的潜力。结果显示出优异的硬磁性，可以在晶界工程的NdFeB中实现，具有Thmn12结构，基于Co基纳米线和L1（0）-feni的稀土磁体，条件是磁体的微观结构进行了优化。

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