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首页> 外文期刊>Journal of nanoparticle research: An interdisciplinary forum for nanoscale science and technology >Optimization of the magnetic properties of aligned Co nanowires/polymer composites for the fabrication of permanent magnets
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Optimization of the magnetic properties of aligned Co nanowires/polymer composites for the fabrication of permanent magnets

机译：用于制备永磁体的取向Co纳米线/聚合物复合材料的磁性优化

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We aim at combining high coercivity magnetic nanowires in a polymer matrix in a view to fabricate rare-earth free bonded magnets. In particular, our aim is to fabricate anisotropic materials by aligning the wires in the polymer matrix. We have explored the different parameters of the fabrication process in order to produce a material with the best possible magnetic properties. We show that the choice of a proper solvent allows obtaining stable nanowire suspensions. The length and the type of the polymer chains play also an important role. Smaller chains (M_w < 10,000) provide better magnetization results. The magnetic field applied during the casting of the material plays also a role and should be of the order of a fraction of a tesla. The local order of the nanowires in the matrix has been characterized by TEM and small angle X-ray scattering. The correlation between the local order of the wires and the magnetic properties is discussed. Materials with coercivity l0Hc up to 0.70 T at room temperature have been obtained.
机译：我们旨在将高矫顽力磁性纳米线结合到聚合物基质中，以制造不含稀土的粘结磁体。特别地，我们的目标是通过在聚合物基体中对齐导线来制造各向异性材料。我们已经探究了制造工艺的不同参数，以便生产出具有最佳磁性能的材料。我们表明，选择合适的溶剂可以得到稳定的纳米线悬浮液。聚合物链的长度和类型也起重要作用。较小的链（M_w <10,000）可提供更好的磁化结果。在材料浇铸过程中施加的磁场也起一定作用，并且应为特斯拉的一部分。纳米线在基体中的局部顺序已通过TEM和小角度X射线散射进行了表征。讨论了线的局部顺序与磁性能之间的相关性。已获得在室温下矫顽力为10 Hc高达0.70 T的材料。

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