Abstract
The heterostructured soft/hard magnetic nanocomposites are very attractive to achieve both large coercivity and high saturation magnetization. However, current physical or chemical approaches are very challenging to fabricate the controllable soft/hard heterostructure. In this work, we report a chemical synthesis which can achieve the expected soft/hard heterostructure. Firstly, we prepared 300–500 nm SmCo–O spherical particles by a flame synthesis. And then, the 20 nm Fe2O3 nanoparticles were uniformly grown on the surface of SmCo–O particles via solvothermal method. The as-prepared SmCo–O/Fe2O3 heterostructure was further coated with CaO and reduced by Ca at 900 °C annealing, which yields SmCo5/Fe heterostructure with SmCo5 of 300 nm and Fe of 20 nm. Attributed to the well-distribution heterostructure and the small-sized Fe nanoparticles, the final SmCo5/Fe0.1 nanocomposites exhibit effective exchange coupling, a relatively high coercivity of 14.7 kOe and enhanced M50kOe of 76.5 emu/g. Our method is easy to achieve large-scale production and extend to fabricate other high-performance REM-based nanocomposites.
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Acknowledgements
This work was financially supported by the Capacity Building for Scientific and Technological Innovation Services Project of Beijing Technology and Business University (Grant No. 19008021178).
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This work was financially supported by the Capacity Building for Scientific and Technological Innovation Services Project of Beijing Technology and Business University (No. 19008021178).
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Yang, K., Liu, X., Zhang, Y. et al. The chemical fabrication of heterostructured SmCo5/Fe nanocomposites. J Mater Sci: Mater Electron 33, 20439–20446 (2022). https://doi.org/10.1007/s10854-022-08859-6
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DOI: https://doi.org/10.1007/s10854-022-08859-6