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Advances in Nanocomposite Rare Earth Magnets

机译：纳米复合稀土磁体的研究进展

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The nanocomposite Nd_2Fe_(14)B/Fe_3B and Nd_2Fe_(14)B/α-Fe magnet materials have been extensively studied since they were first reported by the Philips group in the late 1980s. This new type of permanent magnet materials combines high magnetocrystalline anisotropy of a magnetically hard phase, such as Nd_2Fe_(14)B, and high saturation magnetization of a magnetically soft phase, such as α-Fe or Fe_3B. The exchange coupling interaction at the hard/soft interface tends to keep the magnetization direction of the soft phase in the same direction as in the neighboring hard phase, which enhances the coercivity of the nanocomposite magnet materials. Because nanocomposite magnet materials have much higher saturation magnetization than conventional single-phase permanent magnets, they possess a potential for a very high energy product (up to ～ 80-100 MGOe) as predicted by many researchers.
机译：自1980年代后期飞利浦研究小组首次报道以来，对纳米复合材料Nd_2Fe_（14）B / Fe_3B和Nd_2Fe_（14）B /α-Fe磁体材料进行了广泛的研究。这种新型的永磁材料结合了硬磁相（例如Nd_2Fe_（14）B）的高磁晶各向异性和软磁相（例如α-Fe或Fe_3B）的高饱和磁化强度。硬/软界面处的交换耦合相互作用趋于使软相的磁化方向保持与相邻硬相中的磁化方向相同，从而增强了纳米复合磁体材料的矫顽力。由于纳米复合材料的饱和磁化强度比传统的单相永磁体高得多，因此，正如许多研究人员所预测的那样，它们具有产生非常高的能量乘积（高达80-100 MGOe）的潜力。

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