论文标题
基于纳米棒阵列的L10-Feni/SMCO5交换耦合复合材料的微磁建模
Micromagnetic modelling of nanorods array-based L10-FeNi/SmCo5 exchange-coupled composites
论文作者
论文摘要
交换耦合的纳米复合材料被认为是生产高能量性能永久磁铁的最有前途的材料，在能量产品方面可能会超过新近山虫。在这项工作中，进行了基于纳米棒阵列的最初各向异性结构的L10-Feni/SMCO5复合材料的微磁模拟。研究了对磁性特性的纹理效果。据显示，在L10-Feni期，即使30％的各向异性轴未对准也只会导致10％的胁迫下降。为了最大程度地提高复合材料的磁性，对120 x 120阵列相互作用的纳米棒的参数进行了优化，并被发现为40 nm纳米棒直径和12-20 nm Interod距离。纳米棒的估计直径和阵列的填料密度可提供149 kJ M-3的能量产物值。探索了Interod距离对能量产品值的影响。提出了基于各向异性纳米结构的交换耦合复合材料的生产方法。
Exchange-coupled nanocomposites are considered as the most promising materials for production of high-energy performance permanent magnets, which can exceed neodymium ones in terms of energy product. In this work, micromagnetic simulations of L10-FeNi/SmCo5 composites based on the initially anisotropic structure of nanorods array were performed. Texturing effect on magnetic properties was investigated. It was revealed that even 30 % of anisotropy axes misalignment of grains in L10-FeNi phase would lead to only 10 % drop of coercivity. To maximize magnetic properties of the composites, parameters of microstructure were optimized for 120 x 120 array of interacting nanorods and were found to be 40 nm nanorod diameter and 12-20 nm interrod distance. The estimated diameter of nanorods and the packing density of the array provide energy product values of 149 kJ m-3. Influence of interrod distance on energy product values was explored. Approaches for production of exchange-coupled composites based on anisotropic nanostructures were proposed.
