IFEG 20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Mössbauer analysis of Nd-Co M-type strontium hexaferrite powders with different iron content
Autor/es:
C. HERME; S. E. JACOBO; P. G. BERCOFF; B. ARCONDO
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer
Referencias:
Año: 2010 vol. 195 p. 205 - 212
ISSN:
0304-3843
Resumen:
The structural analysis of strontium hexaferrites SrFexO19 (for x = 12, 11and 10) and substituted samples Sr0.7Nd0.3Fe12−yCo0.3O19 (for y = 0.3, 1.3 and 2.3)prepared through the citrate precursor method is shown. Nd and Co substitutionmodifies saturation magnetization (MS) and increases coercivity (Hc) in samplesheat-treated at 1100◦C for two hours. Mössbauer analyses show different ironoccupancy and the influence of the Fe3+ content is particularly emphasized. Hematitesegregation is observed for some compositions. Samples with low Fe3+ content showthe best magnetic properties with no secondary phase segregation.
