The effects of spark plasma sintering consolidation on the ferromagnetic resonance spectra (FMR) of Ni-Zn ferrites
Por:
Ortega-Zempoalteca R., Flores-Arias Y., Vázquez-Victorio G., Gaudisson T., Ammar S., Vargas-Osorio Z., Acevedo-Salas U., Valenzuela R.
Publicada:
1 may 2014
Resumen:
Magnetic nanoparticles (NPs) of magnetite and Ni-Zn ferrites, synthesized by the forced hydrolysis in a polyol method, were used as the starting material to consolidate them by means of the spark plasma sintering (SPS) method. The microstructural changes were analyzed by X-ray diffraction, transmission electron microscopy (TEM), magnetic hysteresis loops, and ferromagnetic resonance (FMR) measurements. FMR spectra changed from a high resonance field and small linewidth for the nanoparticles to a spectrum with reduced resonance field with extremely broadened linewidths for the consolidated materials. These effects can be ascribed to the evolution from superparamagnetic NPs to the formation of a nanostructured ceramic structure with high grain-to-grain interactions and with increased randomly distributed anisotropy axes. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Filiaciones:
Ortega-Zempoalteca R.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Dept Mat Metal & Ceram, Mexico City 04510, DF, Mexico
Flores-Arias Y.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Dept Mat Metal & Ceram, Mexico City 04510, DF, Mexico
Vázquez-Victorio G.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Dept Mat Metal & Ceram, Mexico City 04510, DF, Mexico
Gaudisson T.:
Laboratoire ITODYS, Université Paris-Diderot, CNRS-UMR-7086, 75205 Paris cedex, France
Ammar S.:
Laboratoire ITODYS, Université Paris-Diderot, CNRS-UMR-7086, 75205 Paris cedex, France
Vargas-Osorio Z.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Dept Mat Metal & Ceram, Mexico City 04510, DF, Mexico
Acevedo-Salas U.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Dept Mat Metal & Ceram, Mexico City 04510, DF, Mexico
Valenzuela R.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Dept Mat Metal & Ceram, Mexico City 04510, DF, Mexico
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