Chemical synthesis of SmCo5/Co magnetic nanocomposites

摘要

A three-step chemical synthesis of SmCo5/Co nanocomposites was developed. Firstly, the Co-Sm(OH)3- Ca(OH)2 precursors were prepared by co-precipitation. Secondly, SmCo5 particles were obtained by reductive annealing of the precursors. At last, the SmCo5/Co nanocoinposites were achieved by chemical deposition based on SmCo5 particles. The SmCo5/Co nanocomposites contain hard magnetic phase of SmCo5 with about 100 nm in size and soft magnetic phase of Co wilh about 8 nm in size, exhibiting in dependent two-phase structure without alloying. Compared to that of single-phase SmCo5 particles, the saturation magnetization of SmCo5/Co nano composites is increased by 27.5%. The synthesis provides a new route to fabricate SmCo-based nanocomposites.