Artículo

Calcination effects on the crystal structure and magnetic properties of CoFe2O4 nanopowders synthesized by the coprecipitation method

Márquez, G.; Sagredo, V.; Guillén Guillén, R.; Attolini, G.; Bolzoni, F.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

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Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Márquez, G., et al. (2020). Calcination effects on the crystal structure and magnetic properties of CoFe2O4 nanopowders synthesized by the coprecipitation method. Revista Mexicana de Física; Vol 66, No 3 May-Jun: 251-257. Recuperado de https://repositorio.unam.mx/contenidos/4107206

Descripción del recurso

Autor(es)
Márquez, G.; Sagredo, V.; Guillén Guillén, R.; Attolini, G.; Bolzoni, F.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Calcination effects on the crystal structure and magnetic properties of CoFe2O4 nanopowders synthesized by the coprecipitation method
Fecha
2020-05-01
Resumen
Cobalt ferrite nanopowders were successfully synthesized by the coprecipitation method and subsequent calcinations at 873 and 1073 K. The effects of the thermal treatments on the crystal structure, particle size and magnetic properties of the nanocompounds were investigated. The particle sizes were determined from transmission electron microscopy and an increase in sizes with the increment in calcination temperature was observed. The mean particle sizes were 29 and 42 nm, for samples calcined at 873 and 1073 K, respectively. By X-ray diffraction it was determined that the nanoparticles crystallized in the cubic spinel structure. Additionally, Fourier transform infrared spectroscopy studies confirms the presence of spinel metal oxide. The magnetization measurements as a function of the temperature and the applied magnetic field suggested that a large part of the nanoparticles calcined at 873 K present a superparamagnetic behavior at room temperature, while those calcined at 1073 K are mainly in the blocked regime at temperatures below 320 K. In addition, remarkably high coercivities of approximately 10.7 and 12.4 kOe were observed at low temperatures, for the nanopowders calcined at 873 and 1073 K, respectively.
Tema
Cobalt ferrite; nanostructured materials; coprecipitation; crystal structure; magnetization.
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

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