A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets

Shen, Bo; Yu, Chao; Su, Dong; Yin, Zhouyang; Li, Junrui; Xi, Zheng; Sun, Shouheng

doi:10.1039/C8NR01690A

Title: A New Strategy to Synthesize Anisotropic SmCo₅ Nanomagnets

Journal Article · 05 April 2018 · Nanoscale

DOI: https://doi.org/10.1039/C8NR01690A · OSTI ID:1433969

Shen, Bo ^[1]; Yu, Chao ^[1]; Su, Dong ^[2]; Yin, Zhouyang ^[1]; Li, Junrui ^[1]; Xi, Zheng ^[1]; Sun, Shouheng ^[1]

Brown Univ., Providence, RI (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

We report a simple strategy to synthesize anisotropic SmCo₅ nanoplates. The strategy involves the pre-synthesis of 125 x 12 nm Sm(OH)₃ nanorods and 10 nm Co nanoparticles followed by self-assembly of these nanorods and nanoparticles into Sm(OH)₃-Co nanocomposites. Once embedded in CaO matrix, the nanocomposite is subject to high temperature (850 °C) annealing in the presence of Ca, leading to the formation of 125 x 10 nm SmCo₅ nanoplates, which are dispersible in ethanol, allowing the alignment in epoxy resin under a 20 kOe magnetic field. The aligned SmCo₅ nanoplates show a square hysteresis behavior with room temperature coercivity reaching 30.1 kOe, which is among the highest values ever reported for SmCo₅ made from chemical methods. The work provides a new approach to high-performance anisotropic SmCo₅ for permanent magnet applications.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1433969

Report Number(s):: BNL--203502-2018-JAAM

Journal Information:: Nanoscale, Journal Name: Nanoscale Journal Issue: 18 Vol. 10; ISSN NANOHL; ISSN 2040-3364

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Chemical Synthesis of Magnetically Hard and Strong Rare Earth Metal Based Nanomagnets Shen, Bo; Yu, Chao; Baker, Alexander A. Angewandte Chemie, Vol. 131, Issue 2 https://doi.org/10.1002/ange.201812007	journal	December 2018
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
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 International Edition, Vol. 58, Issue 41 https://doi.org/10.1002/anie.201907763	journal	September 2019
Chemical Synthesis of Magnetic Nanoparticles for Permanent Magnet Applications Shen, Bo; Sun, Shouheng Chemistry – A European Journal, Vol. 26, Issue 30 https://doi.org/10.1002/chem.201902916	journal	October 2019
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
Dispersible SmCo ₅ nanoparticles with huge coercivity Dong, Ying; Zhang, Tianli; Xia, Zhengcai Nanoscale, Vol. 11, Issue 36 https://doi.org/10.1039/c9nr06653e	journal	January 2019
Enhancing the coercivity of SmCo ₅ magnet through particle size control Tang, Hao; Mamakhel, Mohammad Aref Hasen; Christensen, Mogens Journal of Materials Chemistry C, Vol. 8, Issue 6 https://doi.org/10.1039/c9tc06137a	journal	January 2020

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Title: A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets

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Title: A New Strategy to Synthesize Anisotropic SmCo₅ Nanomagnets