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A Facile Synthesis of SmCo 5 Magnets from Core / Shell Co / Sm 2 O 3 Nanoparticles

The fabrication of SmCo-based nanomagnets exhibiting large coercivity and high magnetic moment has been a recent goal for materials research owing to the potential applications of these nanomagnets in high-performance permanent magnets and high-density data storage media. SmCo5 is one of the most important hard magnetic materials in the SmCo alloy system. This material adopts a hexagonal close-packed (hcp) structure with Co and Co + Sm present in alternating layers along the c-axis, as shown in Figure 1. The easy magnetization direction of SmCo5 is aligned along the c-direction of the lattice, and the magnetocrystalline anisotropy constant