Mössbauer spectral studies of Ti4+ substituted nickel ferrite

• Published in: Journal of magnetism and magnetic materials 2013-04, Vol.331, p.220-224
• Main Authors: Kale, C.M., Bardapurkar, P.P., Shukla, S.J., Jadhav, K.M.
• Format: Article
• Language: English
• Subjects: Coercivity; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Mössbauer effect; other γ-ray spectroscopy; Mössbauer spectroscopy; Physics; Spinel ferrite; X-ray diffraction
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2012.11.047

Polycrystalline ferrites with general formula Ni1+xTixFe2−2xO4, where 0.0≤x≤0.7 were prepared through double sintering ceramic technique using A.R. grade oxides of respective ions. The phase purity of all the samples was checked by X-ray diffraction (XRD) technique. The X-ray diffraction pattern shows all reflections belonging to cubic spinel structure. No extra peak other than cubic spinel was observed in the X-ray diffraction pattern. Using XRD data, the lattice constant was calculated for all the compositions. The lattice constant decreases linearly with Ti4+ substitutions and obeys Vegard's law. The magnetic properties (saturation magnetization, magneton number, coercivity) were investigated using pulse field hysteresis loop technique at room temperature. The values of coercivity decreases with Ti4+ content increases. The saturation magnetization and magneton number both significantly decreases with increase in Ti4+ substitution. Mössbauer spectra of all the samples exhibit sextet. The Mössbauer parameters obtained from Mössbauer spectrum revealed the influence of titanium substitution. ► XRD synthesis of Ti4+ substituted spinel structure. ► Non-magnetic Ti4+ substitution is much effective on magnetic properties. ► Mössbauer spectrum at room temperature influence on hyperfine field for both (A) and [B] sites. ► Zeeman pattern with small isomer shift exhibits small hyperfine field.