Stabilizing Fe Nanoparticles in the SmCo5 Matrix

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

doi:10.1021/acs.nanolett.7b02593

Stabilizing Fe Nanoparticles in the SmCo₅ Matrix

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

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

49 Citations (Scopus)

Abstract

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. © 2017 American Chemical Society.

Original language	English
Pages (from-to)	5695-5698
Journal	Nano Letters
Volume	17
Issue number	9
DOIs	https://doi.org/10.1021/acs.nanolett.7b02593
Publication status	Published - 13 Sept 2017
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

compaction
Magnetic material
nanocomposite
nanoparticle stability
rare-earth hard magnet

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Cite this

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title = "Stabilizing Fe Nanoparticles in the SmCo5 Matrix",

abstract = "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. {\textcopyright} 2017 American Chemical Society.",

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T1 - Stabilizing Fe Nanoparticles in the SmCo5 Matrix

AU - Shen, Bo

AU - Mendoza-Garcia, Adriana

AU - Baker, Sarah E.

AU - McCall, Scott K.

AU - Yu, Chao

AU - Wu, Liheng

AU - Sun, Shouheng

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2017/9/13

Y1 - 2017/9/13

N2 - 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. © 2017 American Chemical Society.

AB - 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. © 2017 American Chemical Society.

KW - compaction

KW - Magnetic material

KW - nanocomposite

KW - nanoparticle stability

KW - rare-earth hard magnet

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U2 - 10.1021/acs.nanolett.7b02593

DO - 10.1021/acs.nanolett.7b02593

M3 - RGC 21 - Publication in refereed journal

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SN - 1530-6984

VL - 17

SP - 5695

EP - 5698

JO - Nano Letters

JF - Nano Letters

IS - 9

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