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A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets


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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Publication details

The article was received on 28 Feb 2018, accepted on 06 Apr 2018 and first published on 06 Apr 2018

Article type: Paper
DOI: 10.1039/C8NR01690A
Citation: Nanoscale, 2018, Accepted Manuscript
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    A New Strategy to Synthesize Anisotropic SmCo5 Nanomagnets

    B. Shen, C. Yu, D. Su, Z. Yin, J. Li, Z. Xi and S. Sun, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR01690A

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