Nano Letters
Nano Letters
5 years ago

Stabilizing Fe Nanoparticles in the SmCo5 Matrix

Stabilizing Fe Nanoparticles in the SmCo5 Matrix
Liheng Wu, Sarah E. Baker, Adriana Mendoza-Garcia, Scott K. McCall, Bo Shen, Shouheng Sun, Chao Yu
We report a new strategy for stabilizing Fe nanoparticles (NPs) in the preparation of SmCo5–Fe nanocomposites. We coat the presynthesized Fe NPs with SiO2 and assemble the Fe/SiO2 NPs with Sm–Co–OH to form a mixture. After reductive annealing at 850 °C in the presence of Ca, we obtain SmCo5–Fe/SiO2 composites. Following aqueous NaOH washing and compaction, we produced exchange-coupled SmCo5–Fe nanocomposites with Fe NPs controlled at 12 nm. Our work demonstrates a successful strategy of stabilizing high moment magnetic NPs in a hard magnetic matrix to produce a nanocomposite with tunable magnetic properties.

Publisher URL: http://dx.doi.org/10.1021/acs.nanolett.7b02593

DOI: 10.1021/acs.nanolett.7b02593

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