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Title: A New Strategy to Synthesize Anisotropic SmCo 5 Nanomagnets

Abstract

We report a simple strategy to synthesize anisotropic SmCo 5 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 SmCo 5 nanoplates, which are dispersible in ethanol, allowing the alignment in epoxy resin under a 20 kOe magnetic field. The aligned SmCo 5 nanoplates show a square hysteresis behavior with room temperature coercivity reaching 30.1 kOe, which is among the highest values ever reported for SmCo 5 made from chemical methods. The work provides a new approach to high-performance anisotropic SmCo 5 for permanent magnet applications.

Authors:
 [1];  [1];  [2];  [1];  [1];  [1];  [1]
  1. Brown Univ., Providence, RI (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1433969
Alternate Identifier(s):
OSTI ID: 1435368
Report Number(s):
BNL-203502-2018-JAAM
Journal ID: ISSN 2040-3364; NANOHL
Grant/Contract Number:  
SC0012704; SC-0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 10; Journal Issue: 18; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY AND ECONOMY; SmCo5; Nanomagnets; Nanocomposites

Citation Formats

Shen, Bo, Yu, Chao, Su, Dong, Yin, Zhouyang, Li, Junrui, Xi, Zheng, and Sun, Shouheng. A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets. United States: N. p., 2018. Web. doi:10.1039/C8NR01690A.
Shen, Bo, Yu, Chao, Su, Dong, Yin, Zhouyang, Li, Junrui, Xi, Zheng, & Sun, Shouheng. A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets. United States. doi:10.1039/C8NR01690A.
Shen, Bo, Yu, Chao, Su, Dong, Yin, Zhouyang, Li, Junrui, Xi, Zheng, and Sun, Shouheng. Fri . "A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets". United States. doi:10.1039/C8NR01690A. https://www.osti.gov/servlets/purl/1433969.
@article{osti_1433969,
title = {A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets},
author = {Shen, Bo and Yu, Chao and Su, Dong and Yin, Zhouyang and Li, Junrui and Xi, Zheng and Sun, Shouheng},
abstractNote = {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.},
doi = {10.1039/C8NR01690A},
journal = {Nanoscale},
number = 18,
volume = 10,
place = {United States},
year = {2018},
month = {4}
}

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Figures / Tables:

Fig. 1 Fig. 1: Schematic illustration of the synthesis of anisotropic SmCo5 nanoplates by self-assembly of Sm(OH)3 NRs and Co NPs, followed by CaO coating and reductive annealing.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.