Synthesis and Characterization of Nano Particles of Mn-Co Ferrites for Technological Applications

Abstract

Manganese doped cobalt nano ferrites were synthesized by co-precipitation method having general formula Co1-xMnxFe2O4 (x =0.0-1.0). These materials are studied to analyze the structural effects on the associated materials properties. The prepared samples were heat treated at 7500 C for two hours. Sintering effect on the structural properties was investigated. The lattice constants of samples were measured from X-rays diffraction data. The (311) peak was used to find crystallites size by the Scherrer formula. Structural morphology was observed by scanning electron microscopy. Variation with temperature in electrical resistivity (DC) and drift mobility were also investigated. The variations with frequency and composition in AC electrical properties of prepared samples were determined. The structural and electrical properties demonstrated firm association. Saturation magnetization, coercivity and remanence of the samples were discussed with the help of sharing of cations within crystals.

Study of Structural and Magnetic Properties, Trivalent Cation Substitution of Cobalt base Spinel Ferrites CoCr0.04LaxFe1.96-xO4 (0 ≤ x ≤ 0.12)

“…The chromium ions are included in those transition metal ions which always take the position of Fe 3+ B-site and control the magnetic parameters such as coercivity and remanence. Similarly, other author's reports are available on Cr 3+ substituted cobalt ferrite synthesized by different methods [9][10][11]. It has been reported that variation in magnetic characteristics of cobalt ferrite are due to the leading super-exchange between the cations of A-site and B-site via oxygen ions.…”

STUDY OF STRUCTURAL AND MAGNETIC PROPERTIES, TRIVALENT CATION SUBSTITUTION OF COBALT BASE SPINEL FERRITES CoCr0.04GdxFe1.96-xO4 (0 ≤ x ≤ 0.12)

“…Ferrites due to their various applications are being used in magnetic resonance imaging, high-density magnetic recording medium, communication signals, and electronics [5][6].The structural and magnetic properties can be modified effectively by using the additives in the composition such as rare-earth elements substitution play vital role in modification of ferrites properties [7]. Toksha et al; [8] described the cobalt ferrite structural and magnetic properties are altered by substituted of Cr 3+ ions which take place of Fe 3+ at B-site and change the structural and magnetic properties [9][10][11][12]. Ferrites characteristics are changing due to the exchanging cations of A-and B-sites via oxygen ions.…”