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Symbiotic, low-temperature, and scalable synthesis of bi-magnetic complex oxide nanocomposites

F. Sayed, G. Kotnana, G. Muscas, Federico Locardi (UGent) , A. Comite, G. Varvaro, D. Peddis, G. Barucca, R. Mathieu and T. Sarkar
(2020) NANOSCALE ADVANCES. 2(2). p.851-859
Author
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Abstract
Functional oxide nanocomposites, where the individual components belong to the family of strongly correlated electron oxides, are an important class of materials, with potential applications in several areas such as spintronics and energy devices. For these materials to be technologically relevant, it is essential to design low-cost and scalable synthesis techniques. In this work, we report a low-temperature and scalable synthesis of prototypical bi-magnetic LaFeO3-CoFe2O4 nanocomposites using a unique sol-based synthesis route, where both the phases of the nanocomposite are formed during the same time. In this bottom-up approach, the heat of formation of one phase (CoFe2O4) allows the crystallization of the second phase (LaFeO3), and completely eliminates the need for conventional high-temperature annealing. A symbiotic effect is observed, as the second phase reduces grain growth of the first phase, thus yielding samples with lower particle sizes. Through thermogravimetric, structural, and morphological studies, we have confirmed the reaction mechanism. The magnetic properties of the bi-magnetic nanocomposites are studied, and reveal a distinct effect of the synthesis conditions on the coercivity of the particles. Our work presents a basic concept of significantly reducing the synthesis temperature of bi-phasic nanocomposites (and thus also the synthesis cost) by using one phase as nucleation sites for the second one, as well as using the heat of formation of one phase to crystallize the other.
Keywords
LAFEO3, GLYCINE

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MLA
Sayed, F., et al. “Symbiotic, Low-Temperature, and Scalable Synthesis of Bi-Magnetic Complex Oxide Nanocomposites.” NANOSCALE ADVANCES, vol. 2, no. 2, 2020, pp. 851–59, doi:10.1039/c9na00619b.
APA
Sayed, F., Kotnana, G., Muscas, G., Locardi, F., Comite, A., Varvaro, G., … Sarkar, T. (2020). Symbiotic, low-temperature, and scalable synthesis of bi-magnetic complex oxide nanocomposites. NANOSCALE ADVANCES, 2(2), 851–859. https://doi.org/10.1039/c9na00619b
Chicago author-date
Sayed, F., G. Kotnana, G. Muscas, Federico Locardi, A. Comite, G. Varvaro, D. Peddis, G. Barucca, R. Mathieu, and T. Sarkar. 2020. “Symbiotic, Low-Temperature, and Scalable Synthesis of Bi-Magnetic Complex Oxide Nanocomposites.” NANOSCALE ADVANCES 2 (2): 851–59. https://doi.org/10.1039/c9na00619b.
Chicago author-date (all authors)
Sayed, F., G. Kotnana, G. Muscas, Federico Locardi, A. Comite, G. Varvaro, D. Peddis, G. Barucca, R. Mathieu, and T. Sarkar. 2020. “Symbiotic, Low-Temperature, and Scalable Synthesis of Bi-Magnetic Complex Oxide Nanocomposites.” NANOSCALE ADVANCES 2 (2): 851–859. doi:10.1039/c9na00619b.
Vancouver
1.
Sayed F, Kotnana G, Muscas G, Locardi F, Comite A, Varvaro G, et al. Symbiotic, low-temperature, and scalable synthesis of bi-magnetic complex oxide nanocomposites. NANOSCALE ADVANCES. 2020;2(2):851–9.
IEEE
[1]
F. Sayed et al., “Symbiotic, low-temperature, and scalable synthesis of bi-magnetic complex oxide nanocomposites,” NANOSCALE ADVANCES, vol. 2, no. 2, pp. 851–859, 2020.
@article{8714846,
  abstract     = {{Functional oxide nanocomposites, where the individual components belong to the family of strongly correlated electron oxides, are an important class of materials, with potential applications in several areas such as spintronics and energy devices. For these materials to be technologically relevant, it is essential to design low-cost and scalable synthesis techniques. In this work, we report a low-temperature and scalable synthesis of prototypical bi-magnetic LaFeO3-CoFe2O4 nanocomposites using a unique sol-based synthesis route, where both the phases of the nanocomposite are formed during the same time. In this bottom-up approach, the heat of formation of one phase (CoFe2O4) allows the crystallization of the second phase (LaFeO3), and completely eliminates the need for conventional high-temperature annealing. A symbiotic effect is observed, as the second phase reduces grain growth of the first phase, thus yielding samples with lower particle sizes. Through thermogravimetric, structural, and morphological studies, we have confirmed the reaction mechanism. The magnetic properties of the bi-magnetic nanocomposites are studied, and reveal a distinct effect of the synthesis conditions on the coercivity of the particles. Our work presents a basic concept of significantly reducing the synthesis temperature of bi-phasic nanocomposites (and thus also the synthesis cost) by using one phase as nucleation sites for the second one, as well as using the heat of formation of one phase to crystallize the other.}},
  author       = {{Sayed, F. and Kotnana, G. and Muscas, G. and Locardi, Federico and Comite, A. and Varvaro, G. and Peddis, D. and Barucca, G. and Mathieu, R. and Sarkar, T.}},
  issn         = {{2516-0230}},
  journal      = {{NANOSCALE ADVANCES}},
  keywords     = {{LAFEO3,GLYCINE}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{851--859}},
  title        = {{Symbiotic, low-temperature, and scalable synthesis of bi-magnetic complex oxide nanocomposites}},
  url          = {{http://doi.org/10.1039/c9na00619b}},
  volume       = {{2}},
  year         = {{2020}},
}
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