IFEG 20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Influence of the iron content on the formation process of substituted Co-Nd strontium hexaferrite prepared by the citrate precursor method
Autor/es:
S. E. JACOBO; C. HERME; P. G. BERCOFF
Revista:
JOURNAL OF ALLOYS AND COMPOUNDS
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Año: 2010 vol. 495 p. 513 - 515
ISSN:
0925-8388
Resumen:
Strontium hexaferrite samples of different composition were prepared by the self-combustionmethod and heat-treated in air at 1100 ◦C for 2 h: SrFe12O19 (S0), Sr0.7Nd0.3Fe11.7Co0.3O19 (SS),Sr0.7Nd0.3Fe10.7Co0.3O19 (SM) and Sr0.7Nd0.3Fe8.4Co0.3O19 (SL). The phase identification of the powders was performed using XRD. Only sample SL (with the lowest iron concentration) shows well-defined peaks of the hexaferrite phase with no secondary phases. NdCo substitution modifies saturation magnetization (MS) and coercivity (Hc) but only samples with low Fe3+ content (SL and SM) show the best magnetic properties, indicating that the best results for applications of this ferrite will be obtained with an iron deficiency in the stoichiometric formulation.
