Artículo
Magnetic properties of cobalt ferrite octahedrons obtained from calcination of granular nanotubes growing on bacterial nanocellulose
Londoño Calderón, César Leandro; Londoño Calderón, A.; Menchaca Nal, Sandra
; Salazar Hena, N.A.; Rosales Rivera. A.; Pampillo, Laura Gabriela; Martinez Garcia, Ricardo
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
09/2019
Editorial:
Elsevier Science
Revista:
Journal of Magnetism and Magnetic Materials
ISSN:
0304-8853
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present an in-depth magnetic study of polycrystalline, microstain-free, magnetic, and thermally stable cobalt ferrite (CoFe2O4) octahedrons with an edge dimension of 214 nm. Nanoparticles were synthesized from granular CoFe2O4 nanotubes growing on bacterial nanocellulose and annealed at T = 1273K. SEM, XRD, and VSM were used to investigate the morphology, structure and magnetic properties of the octahedral particles.The results indicate that heat treatment increases the sizes of the crystallites (2 times) and particles (4 times), compared with the starting material.Moreover, the particles show a change of the magnetization saturation and magnetic anisotropy around 150 K compared with canonical ferrimagnetic materials, associated with a First Order Magnetization Process. The magnetization process as a function of temperature, cooling without (ZFC) and with (FC) different applied magnetic fieldsare explainedby multi-domain theory.ZFC-FC curves show an irreversible branching temperature, which is highly sensitive to the applied magnetic field.In contrast, the temperature for the maximal magnetization value in the ZFC curves, change slightly with the external applied magnetic field, H.
Palabras clave:
OCTAHEDRONS
,
COBALT FERRITE
,
MAGNETIC MULTI-DOMAIN
,
ZFC-FC CURVES
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Identificadores
Colecciones
Articulos(INTECIN)
Articulos de INST.D/TEC.Y CS.DE LA ING."HILARIO FERNANDEZ LONG"
Articulos de INST.D/TEC.Y CS.DE LA ING."HILARIO FERNANDEZ LONG"
Articulos(ITPN)
Articulos de INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Articulos de INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Citación
Londoño Calderón, César Leandro; Londoño Calderón, A.; Menchaca Nal, Sandra; Salazar Hena, N.A.; Rosales Rivera. A.; et al.; Magnetic properties of cobalt ferrite octahedrons obtained from calcination of granular nanotubes growing on bacterial nanocellulose; Elsevier Science; Journal of Magnetism and Magnetic Materials; 495; 9-2019; 165899-165899
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