EFFECT OF Co-SUBSTITUTION OF (Bi,Mn) IONS ON STRUCTURAL, MAGNETIC AND DIELECTRIC PROPERTIES OF (DyFeO3) DYSPROSIUM ORTHOFERRITE

Nanostructures of Dy1-xBixFe1-yMnyO3 system (x,y) = (0.00, 0.10, 0.20, 0.30 and 0.40) were synthesized usingsynchronized double ions substitution by micro-emulsion method at room temperature. Structural, magnetic as well as dielectric properties were investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, vibrating sample magnetometer (VSM) and Dielectric measurements respectively. XRD analysis confirms at all samples have orthorhombic structure, and successful substitution of (Bi,Mn) ions into DyFeO3 crystal structure. The physical parameters were measured from XRD data and found the crystallite size was decreased from (54.9 - 36.6nm) by increasing (x, y) = (Bi, Mn) content. FT-IR analysis showed functional groups and chemical interactions of the sample (x, y) = (0.20) corresponding to the Mn-O, Fe-O and Bi-O bands. The magnetic measurements of all the synthesized samples exhibit paramagnetic behaviour at room temperature. Finally the dielectric parameters results such as the dielectric constant, imaginary dielectric constant and tangent loss were studied at different applied frequencies.