Single-component and exchange-coupled rare earth permanent magnet (REPM) nanostructures are potential candidates for satisfying the demand for device integration and miniaturization. Rare earth-based nanostructures have been commonly studied due to the large magnetocrystalline anisotropy of SmCo₅ and the excellent maximum energy product of Nd₂Fe₁₄B. The coercivity and maximum energy product strongly depend on the microstructures such as size, shape, and interface. The chemical method is a promising strategy to control the microstructure, which may offer an effective way to obtain high-performance, single-component and exchange-coupled REPM nanostructures. Herein, upon understanding the intrinsic magnetic properties and the relationship between the microstructure and extrinsic magnetic properties, we then discuss the microstructure control of REPM nanostructures prepared by the chemical method as well as the resulting regulation of magnetic properties. Finally, we give the perspective on REPM nanostructures.

中文翻译：

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稀土永磁纳米结构：化学设计和微结构控制，以优化磁性能

单组分和交换耦合稀土永磁体（REPM）纳米结构是满足器件集成和小型化需求的潜在候选材料。由于SmCo ₅的大的磁晶各向异性和Nd ₂ Fe ₁₄的优异的最大能量乘积，已对稀土基纳米结构进行了普遍研究B.矫顽力和最大能量乘积在很大程度上取决于微观结构，例如大小，形状和界面。化学方法是控制微结构的有前途的策略，它可能为获得高性能，单组分和交换耦合的REPM纳米结构提供有效的方法。在此，在了解本征磁性能以及微观结构与外部磁性能之间的关系之后，我们将讨论通过化学方法制备的REPM纳米结构的微观结构控制以及由此产生的磁性能调节。最后，我们给出了REPM纳米结构的观点。