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2020-06-18

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/166964

Influence of the synthesis route in obtaining the cubic or tetragonal copper ferrite phases

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Abstract

In this work, magnetic copper ferrite nanoparticles are synthesized by polymer-assisted sol−gel and coprecipitation methods. The obtained purity and particle size reach values of 96% and 94 nm, respectively. Evident differences in the crystal structure have been found in the synthesized nanoparticles. A tetragonal structure is formed by the sol−gel method, while the cubic form is obtained when the coprecipitation approach is used. This work provides experimental evidence of the formation of both phases by using the same reactants and thermal conditions and only modifying the technical procedure. The formation and stability of each phase are analyzed by temperature-dependent measurements, and the observed crystal structure differences are used to propose a potential fundamental explanation to our observations based on differences in the cations' distribution and Jahn−Teller distortion. Moreover, different copper ferrite purities and particle sizes are found when using each of the methods. The spherical shape of the particles and their tendency to sinter, forming micrometric clusters, are observed by electron microscopy. Finally, the divergence in magnetization between the samples prepared by each method supports our argument about the different cations' distribution and opens the door to a wide range of different technological applications for these materials.

Related resource

https://doi.org/10.1021/acs.inorgchem.0c00416

Subject

Nanopartícules, Estructura cristal·lina (Sòlids), Estructura química, Processos químics

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Nanoparticles, Layer structure (Solids), Chemical structure, Chemical processes

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Articles publicats en revistes (Ciència dels Materials i Química Física)

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CALVO DE LA ROSA, Jaume and SEGARRA RUBÍ, Mercè. Influence of the synthesis route in obtaining the cubic or tetragonal copper ferrite phases. Inorganic Chemistry. 2020. ISSN 0020-1669. [consulted: 10 of October of 2026]. Available at: https://hdl.handle.net/2445/166964

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