Structural properties study of the magneto-dielectric composite: Cr0.75Fe1.25O3 (CRFO):Fe0.5Cu0.75Ti0.75O3(FCTO)

The structural properties of a magneto-dielectric composite based on the polycrystalline phases (Cr0.75Fe1.25O3) CRFO100 and (Fe0.5Cu0.75Ti0.75O3) FCTO100, synthesized by the mixed oxide solid-state reaction methodology, have been investigated in this paper. The constituent phases, as well their composite series (Cr0.75Fe1.25O3)([W])-(Fe0.5Cu0.75Ti0.75O3)([100-W]), for W = 0, 17, 34, 50, 66, 83 and 100, were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS), and Fe-57 Mossbauer spectroscopy techniques. The identification and subsequent refinement of XRD data revealed for CRFO100 and FCTO100 trigonal and cubic structures, respectively. The Mossbauer spectra related to the composites signalize a probable paramagnetic doublet due to FCTO100 phase, and a magnetic sextet due to CRFO100 phase, both associated with Fe3+ in octahedral coordination. (C) 2009 Elsevier B.V. All rights reserved.