Effect of the heat treatment conditions on the synthesis of Sr-hexaferrite

RICARDO MARTÍNEZ GARCÍA, V. BILOVOL, L. M. SOCOLOVSKY

Buenos Aires, Argentina

Congreso; At the Frontiers of Condensed Matter V (Current Trends and Novel Materials); 2010

The effect of the heat treatment conditions under oxygen atmosphere on the SrFe12O19 synthesis is analyzed. We study the effect of the partial evacuation of the decomposition's gases of the organometallic precursor on the phase composition of different samples. An accurate structural analysis of samples obtained between 250ºC and 600ºC is reported. From the structural analysis several phases are identified. The amount of secondary phases can be manipulated through the control of the heat treatment conditions, and therefore, this constitutes a methodology to manipulate the composition and the magnetic properties of nanopowders. The quantitative determination of phases is performed by structural refinement of X-ray powder patterns by using Rietveld analysis. Magnetic study is done by Magnetization vs. Applied Magnetic Field measurements at room temperature.