FeCr_2O_4 SPINEL FORMATION: RELATIONSHIP BETWEEN COLOR AND MAGNETICS PROPERTIES

摘要

Through reactions in solid form at high temperatures, using iron oxide (Fe_3O_4) and chromium oxide (Cr_2O_3) in fixed proportions as precursors, the compound was synthesized with spinel structure type FeCr_2O_4. For different temperatures synthesis was conducted the characterization of the material obtained through X-ray diffraction (XRD), spectroscopy UV-VIS-NIR, scanning electron microscopy (SEM), energy dispersion analysis of X-ray (EDX) thermal analysis (DTA / TGA) and magnetic susceptibility of alternating current. The changes in the spectra of reflectance changes are related to the phase identified, the degree of crystalline structure, the spatial order of cations and the magnetic behavior obtained.