INVESTIGADORES
BERCOFF Paula Gabriela
congresos y reuniones científicas
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
Lugar:
La Plata, Buenos Aires
Reunión:
Conferencia; XI Latin American Conference on the Applications of the Mössbauer Effect (LACAME); 2008
Resumen:
The structural analysis of strontium hexaferrites SrFexO19 (for x=12, 11 and 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 substitution modifies saturation magnetization (MS) and increases coercivity (Hc) in samples heat-treated at 1100ºC for two hours.Mössbauer analyses show different iron occupancy and the influence of the Fe3+ content is particularly emphasized.Hematite segregation is observed for some compositions. Samples with low Fe3+ content show the best magnetic properties with no secondary phase segregation.
