IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Cation distribution and magnetic properties of LiMnZn ferrites
Autor/es:
M. ARANA; V. GALVÁN; S. E. JACOBO; P. G. BERCOFF
Revista:
JOURNAL OF ALLOYS AND COMPOUNDS
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 568 p. 5 - 10
ISSN:
0925-8388
Resumen:
Spinel compounds Li0.5x Zn0.6-x Mn0.4 Fe2+0.5x O4 (x=0.0; 0.1; 0.2; 0.4) were produced by the self-combustion sol-gel method. The obtained powders were calcined at 1000ºC for 2 hours in Ar atmosphere. The structural and microstructural characteristics of the resulting samples were studied by magnetization measurements, Mössbauer spectroscopy and X-ray powder diffraction in combination with the Rietveld method. Based on magnetization results, a cation distribution model is proposed which is tested with Rietveld refinements and supported by Mössbauer results. The observed increase in saturation magnetization with Li content in the structure is explained by an unusual distribution of Zn2+ ions in octahedral sites.