Stabilizing Fe Nanoparticles in the SmCo5 Matrix

Shen, Bo; Mendoza-Garcia, Adriana; Baker, Sarah E.; McCall, Scott K.; Yu, Chao; Wu, Liheng; Sun, Shouheng

doi:10.1021/acs.nanolett.7b02593

Title: Stabilizing Fe Nanoparticles in the SmCo₅ Matrix

Journal Article · Thu Aug 03 00:00:00 EDT 2017 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.7b02593· OSTI ID:1409987

^[1];

^[1]; Baker, Sarah E. ^[2]; McCall, Scott K. ^[2];

^[1]; Wu, Liheng ^[1];

^[1]

Brown Univ., Providence, RI (United States). Department of Chemistry
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division

In this paper, 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. In conclusion, 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.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1409987

Report Number(s):: LLNL-JRNL-737360

Journal Information:: Nano Letters, Vol. 17, Issue 9; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 39 works

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A Flame‐Reaction Method for the Large‐Scale Synthesis of High‐Performance Sm _x Co _y Nanomagnets Ma, Zhenhui; Tian, Hui; Cong, Liying Angewandte Chemie, Vol. 131, Issue 41 https://doi.org/10.1002/ange.201907763	journal	September 2019
Chemical Synthesis of Magnetically Hard and Strong Rare Earth Metal Based Nanomagnets Shen, Bo; Yu, Chao; Baker, Alexander A. Angewandte Chemie International Edition, Vol. 58, Issue 2 https://doi.org/10.1002/anie.201812007	journal	December 2018
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Near theoretical ultra-high magnetic performance of rare-earth nanomagnets via the synergetic combination of calcium-reduction and chemoselective dissolution Lee, Jimin; Hwang, Tae-Yeon; Cho, Hong-Baek Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-33973-z	journal	October 2018
Chemically synthesized anisotropic SmCo ₅ nanomagnets with a large energy product Ma, Zhenhui; Liang, Jingming; Ma, Wen Nanoscale, Vol. 11, Issue 26 https://doi.org/10.1039/c9nr03412a	journal	January 2019
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Title: Stabilizing Fe Nanoparticles in the SmCo₅ Matrix