IFEG 20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Application of FORC distributions to the study of magnetic interactions in ferrites of composition Ba1-x Lax+d Fe12-x Cox O19
Autor/es:
OLIVA, M. I.; BERCOFF, P.G.; BERTORELLO, H. R.
Revista:
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Editorial:
Elsevier
Referencias:
Año: 2008 vol. 320 p. 100 - 103
ISSN:
0304-8853
Resumen:
Magnetic interactions in hexaferrite samples of Ba1xLaxþdFe12xCoxO19 composition were studied. The precursor powdersbarium carbonate ðBaCO3Þ, lanthanum oxide (La2O3), hematite (Fe2O3) and cobalt acetatewere milled for 100 h in air atmosphere and heattreated for 1 h at 1000 C. The structural characterization was performed by X-ray diffraction. The FORC distributions show a single peak at high switching fields, indicating that the substituted systems are formed by weakly interacting particles. La excess induces the decoupling of the particles.
